Publications by Department of Quantum Information
Departments of ISQI | Publications of ISQI
2025 |
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| 101. | Deng-Gao Lai, Adam Miranowicz, Franco Nori Nonreciprocal quantum synchronization Nature Communications, 16 (1), pp. 8491, 2025, ISSN: 2041-1723. @article{Lai2025nc2, title = {Nonreciprocal quantum synchronization}, author = {Deng-Gao Lai and Adam Miranowicz and Franco Nori}, url = {https://doi.org/10.1038/s41467-025-63408-z}, doi = {10.1038/s41467-025-63408-z}, issn = {2041-1723}, year = {2025}, date = {2025-09-26}, journal = {Nature Communications}, volume = {16}, number = {1}, pages = {8491}, abstract = {Nonreciprocal physics is garnering enormous attention in both classical and quantum resource fields. Surprisingly, previous demonstrations have not explored nonreciprocal quantum synchronization of phonons, one of the most obvious examples of nonreciprocal quantum resources. Here we fill this gap to demonstrate the possibility of nonreciprocal quantum synchronization, revealing its counterintuitive robustness against random fabrication imperfections and thermal noise of practical devices. Specifically, phonons are synchronized in a chosen direction of light (magnetic field) but unsynchronized in the other, yielding a unique nonreciprocity of quantum synchronization. This happens by harnessing the synergy of the Sagnac and magnon-Kerr effects, leading to an opposite Sagnac-Fizeau shift and an exceptional magnon-Kerr-induced transition. Unlike previous proposals naturally restricted to the low-imperfection regime, our approach beats this limitation, owing to the magnon-Kerr-induced improvement in the resonator resilience. The study lays the foundation for generating fragile-to-robust nonreciprocal quantum resources.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nonreciprocal physics is garnering enormous attention in both classical and quantum resource fields. Surprisingly, previous demonstrations have not explored nonreciprocal quantum synchronization of phonons, one of the most obvious examples of nonreciprocal quantum resources. Here we fill this gap to demonstrate the possibility of nonreciprocal quantum synchronization, revealing its counterintuitive robustness against random fabrication imperfections and thermal noise of practical devices. Specifically, phonons are synchronized in a chosen direction of light (magnetic field) but unsynchronized in the other, yielding a unique nonreciprocity of quantum synchronization. This happens by harnessing the synergy of the Sagnac and magnon-Kerr effects, leading to an opposite Sagnac-Fizeau shift and an exceptional magnon-Kerr-induced transition. Unlike previous proposals naturally restricted to the low-imperfection regime, our approach beats this limitation, owing to the magnon-Kerr-induced improvement in the resonator resilience. The study lays the foundation for generating fragile-to-robust nonreciprocal quantum resources. |
| 100. | Arnab Laha, Dinesh Beniwal, Somnath Ghosh, Adam Miranowicz Scientific Reports, 15 (1), pp. 32866, 2025, ISSN: 2045-2322. @article{Laha2025, title = {Programmable state switching based on higher-order exceptional points in anti-parity-time symmetric microcavity systems}, author = {Arnab Laha and Dinesh Beniwal and Somnath Ghosh and Adam Miranowicz}, url = {https://doi.org/10.1038/s41598-025-13797-4}, doi = {10.1038/s41598-025-13797-4}, issn = {2045-2322}, year = {2025}, date = {2025-09-25}, journal = {Scientific Reports}, volume = {15}, number = {1}, pages = {32866}, abstract = {Diverging from traditional parity-time (PT)-symmetric paradigms, anti-PT (APT) symmetry provides an intriguing framework for harnessing non-Hermitian physics, offering the immense potential to control light-matter interactions in artificial photonic systems reliant on negative-index materials, typically realized with metamaterials. We report a specially configured Fabry-Pérot-type microcavity system by harnessing the unique anti-PT-symmetric constraints with negative-indexed background materials and meticulously balanced gain-loss distributions. We unveil the intriguing topological properties of a parametrically encircled third-order EP (EP3), emerging from two connected second-order EPs (EP2s) among three cavity states. We present a programmable adiabatic state-switching process and highlight the nuanced behaviors of second and third-order branch points by winding around embedded EPs within a 2D gain-loss parameter space. This work explores the theoretical foundations of the topological properties of EPs in negative-indexed media, paving the way for a novel class of metamaterial-based artificial photonic devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Diverging from traditional parity-time (PT)-symmetric paradigms, anti-PT (APT) symmetry provides an intriguing framework for harnessing non-Hermitian physics, offering the immense potential to control light-matter interactions in artificial photonic systems reliant on negative-index materials, typically realized with metamaterials. We report a specially configured Fabry-Pérot-type microcavity system by harnessing the unique anti-PT-symmetric constraints with negative-indexed background materials and meticulously balanced gain-loss distributions. We unveil the intriguing topological properties of a parametrically encircled third-order EP (EP3), emerging from two connected second-order EPs (EP2s) among three cavity states. We present a programmable adiabatic state-switching process and highlight the nuanced behaviors of second and third-order branch points by winding around embedded EPs within a 2D gain-loss parameter space. This work explores the theoretical foundations of the topological properties of EPs in negative-indexed media, paving the way for a novel class of metamaterial-based artificial photonic devices. |
| 99. | Christoph Hotter, Adam Miranowicz, Karol Gietka Phys. Rev. Lett., 135 , pp. 100802, 2025. @article{Hotter25prl, title = {Quantum Metrology in the Ultrastrong Coupling Regime of Light-Matter Interactions: Leveraging Virtual Excitations without Extracting Them}, author = {Christoph Hotter and Adam Miranowicz and Karol Gietka}, url = {https://link.aps.org/doi/10.1103/cxvs-5pb1}, doi = {10.1103/cxvs-5pb1}, year = {2025}, date = {2025-09-01}, journal = {Phys. Rev. Lett.}, volume = {135}, pages = {100802}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 98. | Deng-Gao Lai, Adam Miranowicz, Franco Nori Topological phonon blockade and its transfer via dark-mode engineering Nature Communications, 16 (1), pp. 8094, 2025, ISSN: 2041-1723. @article{Lai2025nc1, title = {Topological phonon blockade and its transfer via dark-mode engineering}, author = {Deng-Gao Lai and Adam Miranowicz and Franco Nori}, url = {https://doi.org/10.1038/s41467-025-63042-9}, doi = {10.1038/s41467-025-63042-9}, issn = {2041-1723}, year = {2025}, date = {2025-08-29}, journal = {Nature Communications}, volume = {16}, number = {1}, pages = {8094}, abstract = {Unidirectional topological behavior, engendered by imposing topological operations winding around an exceptional point, is sensitive to dark modes, which allow deactivating topological operations, resulting in a complete blockade of both mode conversion and phonon transfer between dark and bright modes. Here we demonstrate how to beat this challenge and achieve a versatile yet unique nonreciprocal topological phonon transfer and blockade via dark-mode engineering. This happens by harnessing the power of synthetic magnetism, leading to an extraordinary transition between the dark-mode nonbreaking and breaking regimes, in a precise and controlled manner. Specifically, topological phonon blockade (transfer) happens in the dark-mode nonbreaking (breaking) regime, offering an exciting opportunity of switching between topological phonon blockade and its transfer on demand, which has no counterpart in previous studies. Remarkably, applying dark-mode engineering to quantum optomechanical networks can enable scalable network-based topological phonon transfer and quantum collective ground-state preparation. The proposed mechanism has general validity and can be generalized to the manipulation of various dark-state-related quantum effects, advancing the development of scalable quantum information processors. This study maps a general path towards generating a profoundly different topological quantum resource with immunity against both dark modes and dark states.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Unidirectional topological behavior, engendered by imposing topological operations winding around an exceptional point, is sensitive to dark modes, which allow deactivating topological operations, resulting in a complete blockade of both mode conversion and phonon transfer between dark and bright modes. Here we demonstrate how to beat this challenge and achieve a versatile yet unique nonreciprocal topological phonon transfer and blockade via dark-mode engineering. This happens by harnessing the power of synthetic magnetism, leading to an extraordinary transition between the dark-mode nonbreaking and breaking regimes, in a precise and controlled manner. Specifically, topological phonon blockade (transfer) happens in the dark-mode nonbreaking (breaking) regime, offering an exciting opportunity of switching between topological phonon blockade and its transfer on demand, which has no counterpart in previous studies. Remarkably, applying dark-mode engineering to quantum optomechanical networks can enable scalable network-based topological phonon transfer and quantum collective ground-state preparation. The proposed mechanism has general validity and can be generalized to the manipulation of various dark-state-related quantum effects, advancing the development of scalable quantum information processors. This study maps a general path towards generating a profoundly different topological quantum resource with immunity against both dark modes and dark states. |
| 97. | Kuba Chmielewski, Krzysztof Grygiel, Karol Bartkiewicz Stability Analysis of Three Coupled Kerr Oscillators: Implications for Quantum Computing CMST, 31 (1–3), pp. 33–47, 2025, ISSN: 1505-0602. @article{kuba_stability_2025, title = {Stability Analysis of Three Coupled Kerr Oscillators: Implications for Quantum Computing}, author = {Kuba Chmielewski and Krzysztof Grygiel and Karol Bartkiewicz }, url = {https://cmst.eu/articles/stability-analysis-of-three-coupled-kerr-oscillators-implications-for-quantum-computing/}, doi = {10.12921/cmst.2025.0000012}, issn = {1505-0602}, year = {2025}, date = {2025-08-18}, urldate = {2025-08-22}, journal = {CMST}, volume = {31}, number = {1–3}, pages = {33--47}, abstract = {We investigate the classical dynamics of optical nonlinear Kerr couplers, focusing on their potential relevance to quantum computing applications. The system consists of three Kerr-type nonlinear oscillators arranged in two configurations: a triangular arrangement, where each oscillator is coupled to the others, and a sandwich arrangement, where only the middle oscillator interacts with the two outer ones. The system is driven by an external periodic field and subject to dissipative processes. Its evolution is governed by six non-autonomous differential equations derived from a Kerr Hamiltonian with nonlinear coupling terms. We demonstrate that even for identical Kerr media, the interplay between nonlinear couplings and mismatched fundamental and pump frequencies gives rise to rich and complex dynamics, including the emergence of multiple stable attractors. These attractors are highly sensitive to both the coupling configuration and initial conditions. A key contribution of this work is a detailed stability analysis based on numerical calculation of Lyapunov exponents, revealing transitions from regular to chaotic dynamics as damping is reduced. We identify critical damping thresholds for the onset of chaos and characterize phenomena such as chaotic beats. These findings offer insights for potential experimental realizations and are directly relevant to emerging quantum technologies, where Kerr parametric oscillators play a central role in quantum gates, error correction protocols, and quantum neural network architectures.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We investigate the classical dynamics of optical nonlinear Kerr couplers, focusing on their potential relevance to quantum computing applications. The system consists of three Kerr-type nonlinear oscillators arranged in two configurations: a triangular arrangement, where each oscillator is coupled to the others, and a sandwich arrangement, where only the middle oscillator interacts with the two outer ones. The system is driven by an external periodic field and subject to dissipative processes. Its evolution is governed by six non-autonomous differential equations derived from a Kerr Hamiltonian with nonlinear coupling terms. We demonstrate that even for identical Kerr media, the interplay between nonlinear couplings and mismatched fundamental and pump frequencies gives rise to rich and complex dynamics, including the emergence of multiple stable attractors. These attractors are highly sensitive to both the coupling configuration and initial conditions. A key contribution of this work is a detailed stability analysis based on numerical calculation of Lyapunov exponents, revealing transitions from regular to chaotic dynamics as damping is reduced. We identify critical damping thresholds for the onset of chaos and characterize phenomena such as chaotic beats. These findings offer insights for potential experimental realizations and are directly relevant to emerging quantum technologies, where Kerr parametric oscillators play a central role in quantum gates, error correction protocols, and quantum neural network architectures. |
| 96. | Marek Kopciuch, Adam Miranowicz Phys. Rev. Res., 7 , pp. 033187, 2025. @article{Kopciuch2025, title = {Liouvillian and Ħamiltonian exceptional points of atomic vapors: Ŧhe spectral signatures of quantum jumps}, author = {Marek Kopciuch and Adam Miranowicz}, url = {https://link.aps.org/doi/10.1103/zxw5-nlsn}, doi = {10.1103/zxw5-nlsn}, year = {2025}, date = {2025-08-01}, journal = {Phys. Rev. Res.}, volume = {7}, pages = {033187}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 95. | Javid Naikoo, Ravindra W. Chhajlany, Adam Miranowicz Enhanced quantum sensing with hybrid exceptional-diabolic singularities New Journal of Physics, 27 (6), pp. 064505, 2025. @article{Naikoo_2025, title = {Enhanced quantum sensing with hybrid exceptional-diabolic singularities}, author = {Javid Naikoo and Ravindra W. Chhajlany and Adam Miranowicz}, url = {https://dx.doi.org/10.1088/1367-2630/addc12}, doi = {10.1088/1367-2630/addc12}, year = {2025}, date = {2025-06-01}, journal = {New Journal of Physics}, volume = {27}, number = {6}, pages = {064505}, publisher = {IOP Publishing}, abstract = {We report an enhanced sensitivity for detecting linear perturbations near hybrid (doubly degenerated) exceptional-diabolic (HED) singular points in a four mode bosonic system. The sensitivity enhancement is attributed to a singular response function, with the pole order determining the scaling of estimation error. At HED singular points, the error scaling exhibits a twofold improvement over non-HED singular points. The ultimate bound on estimation error is derived via quantum Fisher information, with heterodyne detection identified as the measurement achieving this optimal scaling.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We report an enhanced sensitivity for detecting linear perturbations near hybrid (doubly degenerated) exceptional-diabolic (HED) singular points in a four mode bosonic system. The sensitivity enhancement is attributed to a singular response function, with the pole order determining the scaling of estimation error. At HED singular points, the error scaling exhibits a twofold improvement over non-HED singular points. The ultimate bound on estimation error is derived via quantum Fisher information, with heterodyne detection identified as the measurement achieving this optimal scaling. |
| 94. | Kuan-Yi Lee, Jhen-Dong Lin, Karel Lemr, Antonín Černoch, Adam Miranowicz, Franco Nori, Huan-Yu Ku, Yueh-Nan Chen Unveiling quantum steering by quantum-classical uncertainty complementarity npj Quantum Information, 11 (1), pp. 72, 2025, ISSN: 2056-6387. @article{Lee2025, title = {Unveiling quantum steering by quantum-classical uncertainty complementarity}, author = {Kuan-Yi Lee and Jhen-Dong Lin and Karel Lemr and Antonín {Č}ernoch and Adam Miranowicz and Franco Nori and Huan-Yu Ku and Yueh-Nan Chen}, url = {https://doi.org/10.1038/s41534-025-01017-w}, doi = {10.1038/s41534-025-01017-w}, issn = {2056-6387}, year = {2025}, date = {2025-05-08}, journal = {npj Quantum Information}, volume = {11}, number = {1}, pages = {72}, abstract = {One of the remarkable aspects of quantum steering is its ability to violate local uncertainty complementarity relations. In this vein of study, various steering witnesses have been developed. Here, we introduce a novel complementarity relation between the system's quantum and classical uncertainties corresponding to the distillable coherence and the von Neumann entropy, respectively. We show that the proposed complementarity relation is tighter than the entropic uncertainty relation (EUR). Leveraging this result, we propose a steering witness that is more efficient than the EUR. From the operational perspective, the steering witness quantifies the amount of extra distillable coherence facilitated by quantum steerability. Notably, the proposed steering witness serves as a full entanglement measure for pure bipartite states--an ability that the EUR lacks. We also experimentally validate such a property through a photonic system. Furthermore, a deeper connection to the uncertainty principle is revealed by showcasing the steering-induced distillable coherence can quantify measurement incompatibility and quantum steerability under genuine incoherent operations. Our work establishes a clear quantitative and operational link between coherence and steering, which are vital resources of quantum technologies, and underscores our efforts in bridging the uncertainty principle with quantum coherence.}, keywords = {}, pubstate = {published}, tppubtype = {article} } One of the remarkable aspects of quantum steering is its ability to violate local uncertainty complementarity relations. In this vein of study, various steering witnesses have been developed. Here, we introduce a novel complementarity relation between the system's quantum and classical uncertainties corresponding to the distillable coherence and the von Neumann entropy, respectively. We show that the proposed complementarity relation is tighter than the entropic uncertainty relation (EUR). Leveraging this result, we propose a steering witness that is more efficient than the EUR. From the operational perspective, the steering witness quantifies the amount of extra distillable coherence facilitated by quantum steerability. Notably, the proposed steering witness serves as a full entanglement measure for pure bipartite states--an ability that the EUR lacks. We also experimentally validate such a property through a photonic system. Furthermore, a deeper connection to the uncertainty principle is revealed by showcasing the steering-induced distillable coherence can quantify measurement incompatibility and quantum steerability under genuine incoherent operations. Our work establishes a clear quantitative and operational link between coherence and steering, which are vital resources of quantum technologies, and underscores our efforts in bridging the uncertainty principle with quantum coherence. |
| 93. | Chia-Yi Ju, Adam Miranowicz, Jacob Barnett, Guang-Yin Chen, Franco Nori Phys. Rev. A, 111 , pp. 052213, 2025. @article{Ju25, title = {Heisenberg and Heisenberg-like representations via Hilbert-space-bundle geometry in the non-Hermitian regime}, author = {Chia-Yi Ju and Adam Miranowicz and Jacob Barnett and Guang-Yin Chen and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevA.111.052213}, doi = {10.1103/PhysRevA.111.052213}, year = {2025}, date = {2025-05-01}, journal = {Phys. Rev. A}, volume = {111}, pages = {052213}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 92. | Przemysław Chełminiak, Jan Wójcik, Antoni Wójcik Physical Review E, 111 (4), pp. 044143 , 2025. @article{Chełminiak2025, title = {Discrete-time walk on one-dimensional lattice under stochastic resetting: Advantage of quantum over classical scenario}, author = {Przemysław Chełminiak and Jan Wójcik and Antoni Wójcik}, doi = {10.1103/PhysRevE.111.044143}, year = {2025}, date = {2025-04-30}, journal = {Physical Review E}, volume = {111}, number = {4}, pages = {044143 }, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 91. | Przemysław Chełminiak, Jan Wójcik, Antoni Wójcik Phys. Rev. E, 111 , pp. 044143, 2025. @article{PhysRevE.111.044143, title = {Discrete-time walk on one-dimensional lattice under stochastic resetting: Advantage of quantum over classical scenario}, author = {Przemysław Chełminiak and Jan Wójcik and Antoni Wójcik}, url = {https://link.aps.org/doi/10.1103/PhysRevE.111.044143}, doi = {10.1103/PhysRevE.111.044143}, year = {2025}, date = {2025-04-01}, journal = {Phys. Rev. E}, volume = {111}, pages = {044143}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 90. | Jian Tang, Yunlan Zuo, Xun-Wei Xu, Ran Huang, Adam Miranowicz, Franco Nori, Hui Jing Achieving Robust Single-Photon Blockade with a Single Nanotip Nano Letters, 25 (12), pp. 4705-4712, 2025, ISSN: 1530-6984. @article{Tang2025, title = {Achieving Robust Single-Photon Blockade with a Single Nanotip}, author = {Jian Tang and Yunlan Zuo and Xun-Wei Xu and Ran Huang and Adam Miranowicz and Franco Nori and Hui Jing}, url = {https://doi.org/10.1021/acs.nanolett.4c05433}, doi = {10.1021/acs.nanolett.4c05433}, issn = {1530-6984}, year = {2025}, date = {2025-03-26}, journal = {Nano Letters}, volume = {25}, number = {12}, pages = {4705-4712}, publisher = {American Chemical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 89. | Arpan Roy, Arnab Laha, Abhijit Biswas, Bishnu P Pal, Somnath Ghosh, Adam Miranowicz Dynamically encircled higher-order exceptional points in an optical fiber Physica Scripta, 100 (4), pp. 045529, 2025. @article{Roy2025, title = {Dynamically encircled higher-order exceptional points in an optical fiber}, author = {Arpan Roy and Arnab Laha and Abhijit Biswas and Bishnu P Pal and Somnath Ghosh and Adam Miranowicz}, url = {https://dx.doi.org/10.1088/1402-4896/adbea6}, doi = {10.1088/1402-4896/adbea6}, year = {2025}, date = {2025-03-01}, journal = {Physica Scripta}, volume = {100}, number = {4}, pages = {045529}, publisher = {IOP Publishing}, abstract = {The unique properties of exceptional point (EP) singularities, arising from non-Hermitian physics, have unlocked new possibilities for manipulating lightmatter interactions. A tailored gain-loss variation, while encircling higher-order EPs dynamically, can significantly enhance the control of the topological flow of light in multi-level photonic systems. In particular, the integration of dynamically encircled higher-order EPs within fiber geometries holds great promise for advancing specialty optical fiber applications, though a research gap remains in exploring and realizing such configurations. Here, we report a triple-core specialty optical fiber engineered with customized loss and gain to explore the topological characteristics of a third-order EP (EP3), formed by two interconnected second-order EPs (EP2s). We elucidate chiral and nonchiral light transmission through the fiber, based on second- and third-order branch point behaviors and associated adiabatic and nonadiabatic modal characteristics, while considering various dynamical parametric loops to encircle the embedded EPs. We investigate the persistence of EP-induced light dynamics specifically in the parametric regions immediately adjacent to, though not encircling, the embedded EPs, thereby potentially leading to improved device performance. Our findings offer significant implications for the design and implementation of novel light management technologies in all-fiber photonics and communications.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The unique properties of exceptional point (EP) singularities, arising from non-Hermitian physics, have unlocked new possibilities for manipulating lightmatter interactions. A tailored gain-loss variation, while encircling higher-order EPs dynamically, can significantly enhance the control of the topological flow of light in multi-level photonic systems. In particular, the integration of dynamically encircled higher-order EPs within fiber geometries holds great promise for advancing specialty optical fiber applications, though a research gap remains in exploring and realizing such configurations. Here, we report a triple-core specialty optical fiber engineered with customized loss and gain to explore the topological characteristics of a third-order EP (EP3), formed by two interconnected second-order EPs (EP2s). We elucidate chiral and nonchiral light transmission through the fiber, based on second- and third-order branch point behaviors and associated adiabatic and nonadiabatic modal characteristics, while considering various dynamical parametric loops to encircle the embedded EPs. We investigate the persistence of EP-induced light dynamics specifically in the parametric regions immediately adjacent to, though not encircling, the embedded EPs, thereby potentially leading to improved device performance. Our findings offer significant implications for the design and implementation of novel light management technologies in all-fiber photonics and communications. |
| 88. | Jhen-Dong Lin, Po-Chen Kuo, Neill Lambert, Adam Miranowicz, Franco Nori, Yueh-Nan Chen Non-Markovian quantum exceptional points Nature Communications, 16 (1), pp. 1289, 2025, ISSN: 2041-1723. @article{Lin2025, title = {Non-Markovian quantum exceptional points}, author = {Jhen-Dong Lin and Po-Chen Kuo and Neill Lambert and Adam Miranowicz and Franco Nori and Yueh-Nan Chen}, url = {https://doi.org/10.1038/s41467-025-56242-w}, doi = {10.1038/s41467-025-56242-w}, issn = {2041-1723}, year = {2025}, date = {2025-02-03}, journal = {Nature Communications}, volume = {16}, number = {1}, pages = {1289}, abstract = {Exceptional points (EPs) are singularities in the spectra of non-Hermitian operators where eigenvalues and eigenvectors coalesce. Open quantum systems have recently been explored as EP testbeds due to their non-Hermitian nature. However, most studies focus on the Markovian limit, leaving a gap in understanding EPs in the non-Markovian regime. This work addresses this gap by proposing a general framework based on two numerically exact descriptions of non-Markovian dynamics: the pseudomode equation of motion (PMEOM) and the hierarchical equations of motion (HEOM). The PMEOM is particularly useful due to its Lindblad-type structure, aligning with previous studies in the Markovian regime while offering deeper insights into EP identification. This framework incorporates non-Markovian effects through auxiliary degrees of freedom, enabling the discovery of additional or higher-order EPs that are inaccessible in the Markovian regime. We demonstrate the utility of this approach using the spin-boson model and linear bosonic systems.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Exceptional points (EPs) are singularities in the spectra of non-Hermitian operators where eigenvalues and eigenvectors coalesce. Open quantum systems have recently been explored as EP testbeds due to their non-Hermitian nature. However, most studies focus on the Markovian limit, leaving a gap in understanding EPs in the non-Markovian regime. This work addresses this gap by proposing a general framework based on two numerically exact descriptions of non-Markovian dynamics: the pseudomode equation of motion (PMEOM) and the hierarchical equations of motion (HEOM). The PMEOM is particularly useful due to its Lindblad-type structure, aligning with previous studies in the Markovian regime while offering deeper insights into EP identification. This framework incorporates non-Markovian effects through auxiliary degrees of freedom, enabling the discovery of additional or higher-order EPs that are inaccessible in the Markovian regime. We demonstrate the utility of this approach using the spin-boson model and linear bosonic systems. |
| 87. | Chun-Wang Wu, Man-Chao Zhang, Yan-Li Zhou, Ting Chen, Ran Huang, Yi Xie, Wen-bo Su, Bao-Quan Ou, Wei Wu, Adam Miranowicz, Franco Nori, Jie Zhang, Hui Jing, Ping-Xing Chen Observation of quantum temporal correlations well beyond Lüders bound Phys. Rev. Res., 7 , pp. 013058, 2025. @article{Wu2025, title = {Observation of quantum temporal correlations well beyond Lüders bound}, author = {Chun-Wang Wu and Man-Chao Zhang and Yan-Li Zhou and Ting Chen and Ran Huang and Yi Xie and Wen-bo Su and Bao-Quan Ou and Wei Wu and Adam Miranowicz and Franco Nori and Jie Zhang and Hui Jing and Ping-Xing Chen}, url = {https://link.aps.org/doi/10.1103/PhysRevResearch.7.013058}, doi = {10.1103/PhysRevResearch.7.013058}, year = {2025}, date = {2025-01-01}, journal = {Phys. Rev. Res.}, volume = {7}, pages = {013058}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 86. | Marceli Koralewski, Małgorzata Paprzycka, Mikołaj Baranowski Faraday effect of imidazole and pyrrolidine and their N-alkyl derivatives Journal of Molecular Liquids, 427 , pp. 127398, 2025, ISSN: 0167-7322. @article{KORALEWSKI2025127398, title = {Faraday effect of imidazole and pyrrolidine and their N-alkyl derivatives}, author = {Marceli Koralewski and Małgorzata Paprzycka and Mikołaj Baranowski}, url = {https://www.sciencedirect.com/science/article/pii/S0167732225005653}, doi = {https://doi.org/10.1016/j.molliq.2025.127398}, issn = {0167-7322}, year = {2025}, date = {2025-01-01}, journal = {Journal of Molecular Liquids}, volume = {427}, pages = {127398}, abstract = {Ionic liquids (ILs) are of great interest because of their spectacular physicochemical properties and applications. Recent research suggests the possible application of magnetic ILs (MILs) in photonics. That fact motivated us to start with magnetooptical (MO) studies on the precursor compounds of most known ILs based on imidazolium and pyrrolidinium cations to gain information allowed tailoring the magnitude of the Faraday effect (FE) in this kind of materials. Herein, we present results of the magnetooptical rotatory dispersion (MORD) and refractive index (RI). The MORD spectrum was described by the Faraday B-terms according to the Serber theory. The respective parameters describing the FE and RI were evaluated and correlated with the position of the experimentally observed optical edge for the compounds studied. The Verdet constant varies very slightly with temperature as expected for diamagnetic materials. Comparison measurements for other precursors of heterocyclic ring compounds of cations of Ils, i.e. pyridine, piperidine, pyrazole, and pyrrole, as well as their methyl derivatives, were also made. The results obtained allow to establish the empirical relation between the Verdet constant and the N-alkyl chain length, as well as the diamagnetic susceptibility and optical polarizability, which were evaluated for studied materials. Comparison of the obtained results with the data for benzene and cyclohexane allowed for the correlation of the V constant with the degree of aromaticity of the studied compounds. RI was also correlated with the N-alkyl chain length. The developed relations will be useful for designing new MILs and tailoring their MO properties.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Ionic liquids (ILs) are of great interest because of their spectacular physicochemical properties and applications. Recent research suggests the possible application of magnetic ILs (MILs) in photonics. That fact motivated us to start with magnetooptical (MO) studies on the precursor compounds of most known ILs based on imidazolium and pyrrolidinium cations to gain information allowed tailoring the magnitude of the Faraday effect (FE) in this kind of materials. Herein, we present results of the magnetooptical rotatory dispersion (MORD) and refractive index (RI). The MORD spectrum was described by the Faraday B-terms according to the Serber theory. The respective parameters describing the FE and RI were evaluated and correlated with the position of the experimentally observed optical edge for the compounds studied. The Verdet constant varies very slightly with temperature as expected for diamagnetic materials. Comparison measurements for other precursors of heterocyclic ring compounds of cations of Ils, i.e. pyridine, piperidine, pyrazole, and pyrrole, as well as their methyl derivatives, were also made. The results obtained allow to establish the empirical relation between the Verdet constant and the N-alkyl chain length, as well as the diamagnetic susceptibility and optical polarizability, which were evaluated for studied materials. Comparison of the obtained results with the data for benzene and cyclohexane allowed for the correlation of the V constant with the degree of aromaticity of the studied compounds. RI was also correlated with the N-alkyl chain length. The developed relations will be useful for designing new MILs and tailoring their MO properties. |
| 85. | Vyacheslav Ivzhenko, Jolanta Natalia Latosińska, Edvin Hevorkian, Miroslaw Rucki, Tamara Kosenchuk, Natalia Shamsutdinova, Tadeusz Szumiata, Volodymyr Chishkala, Arturas Kilikevicius Optimization of SiC--TiC Composite Manufacturing by Electroconsolidation Method Materials, 18 (9), pp. 2062, 2025, ISSN: 1996-1944. @article{ma18092062, title = {Optimization of SiC--TiC Composite Manufacturing by Electroconsolidation Method}, author = {Vyacheslav Ivzhenko and Jolanta Natalia Latosińska and Edvin Hevorkian and Miroslaw Rucki and Tamara Kosenchuk and Natalia Shamsutdinova and Tadeusz Szumiata and Volodymyr Chishkala and Arturas Kilikevicius}, url = {https://www.mdpi.com/1996-1944/18/9/2062}, doi = {10.3390/ma18092062}, issn = {1996-1944}, year = {2025}, date = {2025-01-01}, journal = {Materials}, volume = {18}, number = {9}, pages = {2062}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 84. | Miroslaw Rucki, Edvin Hevorkian, Jolanta Natalia Latosińska, Vasyl Kolodnitskyi, Leszek Chalko, Dmitrij Morozow, Waldemar Samociuk, Jonas Matijosius, Milan Masař, Tomasz Ryba Applied Sciences, 15 (9), pp. 4955, 2025, ISSN: 2076-3417. @article{app15094955, title = {Reproducibility Assessment of Zirconia-Based Ceramics Fabricated out of Nanopowders by Electroconsolidation Method}, author = {Miroslaw Rucki and Edvin Hevorkian and Jolanta Natalia Latosińska and Vasyl Kolodnitskyi and Leszek Chalko and Dmitrij Morozow and Waldemar Samociuk and Jonas Matijosius and Milan Masař and Tomasz Ryba}, url = {https://www.mdpi.com/2076-3417/15/9/4955}, doi = {10.3390/app15094955}, issn = {2076-3417}, year = {2025}, date = {2025-01-01}, journal = {Applied Sciences}, volume = {15}, number = {9}, pages = {4955}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 83. | Vyacheslav Ivzhenko, Edvin Hevorkian, Miroslaw Rucki, Volodymyr Nerubatskyi, Zbigniew Krzysiak, Volodymyr Chyshkala, Jolanta Natalia Latosińska, Waldemar Samociuk, Tadeusz Szumiata, Tamara Kosenchuk, Jacek Caban Materials, 18 (18), pp. 4331, 2025, ISSN: 1996-1944. @article{ma18184331, title = {Improvement of Microstructure and Mechanical Properties of SiC--VC System Obtained by Electroconsolidation}, author = {Vyacheslav Ivzhenko and Edvin Hevorkian and Miroslaw Rucki and Volodymyr Nerubatskyi and Zbigniew Krzysiak and Volodymyr Chyshkala and Jolanta Natalia Latosińska and Waldemar Samociuk and Tadeusz Szumiata and Tamara Kosenchuk and Jacek Caban}, url = {https://www.mdpi.com/1996-1944/18/18/4331}, doi = {10.3390/ma18184331}, issn = {1996-1944}, year = {2025}, date = {2025-01-01}, journal = {Materials}, volume = {18}, number = {18}, pages = {4331}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 82. | Jolanta Natalia Latosińska, Magdalena Latosińska, Janez Seliger, Veselko Žagar, Tomaž Apih Molecules, 30 (5), pp. 1096, 2025, ISSN: 1420-3049. @article{molecules30051096, title = {Anti-Butterfly Effect in Ribavirin Studied by Combined Experiment (PXRD/1H-14N NQR Cross-Relaxation Spectroscopy), Quantum Chemical Calculations, Molecular Docking, Molecular Dynamics Simulations, and Novel Structure-Binding Strength and Quadrupolar Indices}, author = {Jolanta Natalia Latosińska and Magdalena Latosińska and Janez Seliger and Veselko Žagar and Tomaž Apih}, url = {https://www.mdpi.com/1420-3049/30/5/1096}, doi = {10.3390/molecules30051096}, issn = {1420-3049}, year = {2025}, date = {2025-01-01}, journal = {Molecules}, volume = {30}, number = {5}, pages = {1096}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2024 |
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| 81. | Xin Wang, Jia-Qi Li, Tao Liu, Adam Miranowicz, Franco Nori Long-range four-body interactions in structured nonlinear photonic waveguides Phys. Rev. Res., 6 , pp. 043226, 2024. @article{Wang24prr, title = {Long-range four-body interactions in structured nonlinear photonic waveguides}, author = {Xin Wang and Jia-Qi Li and Tao Liu and Adam Miranowicz and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevResearch.6.043226}, doi = {10.1103/PhysRevResearch.6.043226}, year = {2024}, date = {2024-12-01}, journal = {Phys. Rev. Res.}, volume = {6}, pages = {043226}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 80. | Shilan Abo, Patrycja Tulewicz, Karol Bartkiewicz, Şahin K Özdemir, Adam Miranowicz Experimental Liouvillian exceptional points in a quantum system without Hamiltonian singularities New Journal of Physics, 26 (12), pp. 123032, 2024. @article{Abo_2024, title = {Experimental Liouvillian exceptional points in a quantum system without Hamiltonian singularities}, author = {Shilan Abo and Patrycja Tulewicz and Karol Bartkiewicz and Şahin K Özdemir and Adam Miranowicz}, url = {https://dx.doi.org/10.1088/1367-2630/ad98b6}, doi = {10.1088/1367-2630/ad98b6}, year = {2024}, date = {2024-12-01}, journal = {New Journal of Physics}, volume = {26}, number = {12}, pages = {123032}, publisher = {IOP Publishing}, abstract = {Hamiltonian exceptional points (HEPs) are spectral degeneracies of non-Hermitian Hamiltonians describing classical and semiclassical open systems with losses and/or gain. However, this definition overlooks the occurrence of quantum jumps in the evolution of open quantum systems. These quantum effects are properly accounted for by considering quantum Liouvillians and their exceptional points (LEPs). Specifically, an LEP corresponds to the coalescence of two or more eigenvalues and the corresponding eigenmatrices of a given Liouvillian at critical values of external parameters (Minganti et al 2019 Phys. Rev. A 100 062131). Here, we explicitly describe how standard quantum process tomography, which reveals the dynamics of a quantum system, can be readily applied to detect and characterize quantum LEPs of quantum non-Hermitian systems. We conducted experiments on an IBM quantum processor to implement a prototype model with one-, two-, and three qubits simulating the decay of a single qubit through competing channels, resulting in LEPs but not HEPs. Subsequently, we performed tomographic reconstruction of the corresponding experimental Liouvillian and its LEPs using both single- and two-qubit operations. This example underscores the efficacy of process tomography in tuning and observing LEPs even in the absence of HEPs.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Hamiltonian exceptional points (HEPs) are spectral degeneracies of non-Hermitian Hamiltonians describing classical and semiclassical open systems with losses and/or gain. However, this definition overlooks the occurrence of quantum jumps in the evolution of open quantum systems. These quantum effects are properly accounted for by considering quantum Liouvillians and their exceptional points (LEPs). Specifically, an LEP corresponds to the coalescence of two or more eigenvalues and the corresponding eigenmatrices of a given Liouvillian at critical values of external parameters (Minganti et al 2019 Phys. Rev. A 100 062131). Here, we explicitly describe how standard quantum process tomography, which reveals the dynamics of a quantum system, can be readily applied to detect and characterize quantum LEPs of quantum non-Hermitian systems. We conducted experiments on an IBM quantum processor to implement a prototype model with one-, two-, and three qubits simulating the decay of a single qubit through competing channels, resulting in LEPs but not HEPs. Subsequently, we performed tomographic reconstruction of the corresponding experimental Liouvillian and its LEPs using both single- and two-qubit operations. This example underscores the efficacy of process tomography in tuning and observing LEPs even in the absence of HEPs. |
| 79. | Wei Qin, Adam Miranowicz, Franco Nori Exponentially Improved Dispersive Qubit Readout with Squeezed Light Phys. Rev. Lett., 133 , pp. 233605, 2024. @article{Wei2024prr, title = {Exponentially Improved Dispersive Qubit Readout with Squeezed Light}, author = {Wei Qin and Adam Miranowicz and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.133.233605}, doi = {10.1103/PhysRevLett.133.233605}, year = {2024}, date = {2024-12-01}, journal = {Phys. Rev. Lett.}, volume = {133}, pages = {233605}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 78. | Wanhua Su, Wei Qin, Adam Miranowicz, Tao Li, Franco Nori Heralded nonlocal quantum gates for distributed quantum computation in a decoherence-free subspace Phys. Rev. A, 110 , pp. 052612, 2024. @article{Su2024pra, title = {Heralded nonlocal quantum gates for distributed quantum computation in a decoherence-free subspace}, author = {Wanhua Su and Wei Qin and Adam Miranowicz and Tao Li and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevA.110.052612}, doi = {10.1103/PhysRevA.110.052612}, year = {2024}, date = {2024-11-01}, journal = {Phys. Rev. A}, volume = {110}, pages = {052612}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 77. | Ievgen I Arkhipov, Fabrizio Minganti, Adam Miranowicz, Sahin K Özdemir, Franco Nori Restoring Adiabatic State Transfer in Time-Modulated Non-Hermitian Systems Phys. Rev. Lett., 133 , pp. 113802, 2024. @article{Arkhipov24prl, title = {Restoring Adiabatic State Transfer in Time-Modulated Non-Hermitian Systems}, author = {Ievgen I Arkhipov and Fabrizio Minganti and Adam Miranowicz and Sahin K Özdemir and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.133.113802}, doi = {10.1103/PhysRevLett.133.113802}, year = {2024}, date = {2024-09-01}, journal = {Phys. Rev. Lett.}, volume = {133}, pages = {113802}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 76. | Josef Kadlec, Karol Bartkiewicz, Antonín Černoch, Karel Lemr, Adam Miranowicz Experimental relative entanglement potentials of single-photon states Phys. Rev. A, 110 , pp. 023720, 2024. @article{PhysRevA.110.023720, title = {Experimental relative entanglement potentials of single-photon states}, author = {Josef Kadlec and Karol Bartkiewicz and Antonín Černoch and Karel Lemr and Adam Miranowicz}, url = {https://link.aps.org/doi/10.1103/PhysRevA.110.023720}, doi = {10.1103/PhysRevA.110.023720}, year = {2024}, date = {2024-08-01}, journal = {Phys. Rev. A}, volume = {110}, pages = {023720}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 75. | Vojtiěch Trávníček, Jan Roik, Karol Bartkiewicz, Antonín Černoch, Paweł Horodecki, Karel Lemr Sensitivity versus selectivity in entanglement detection via collective witnesses Phys. Rev. Res., 6 , pp. 033056, 2024. @article{PhysRevResearch.6.033056, title = {Sensitivity versus selectivity in entanglement detection via collective witnesses}, author = {Vojtiěch Trávníček and Jan Roik and Karol Bartkiewicz and Antonín Černoch and Paweł Horodecki and Karel Lemr}, url = {https://link.aps.org/doi/10.1103/PhysRevResearch.6.033056}, doi = {10.1103/PhysRevResearch.6.033056}, year = {2024}, date = {2024-07-01}, journal = {Phys. Rev. Res.}, volume = {6}, pages = {033056}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 74. | Anna Jelec, Karol Bartkiewicz, Katarzyna Stachowiak-Szymczak, Joanna Ziobro-Strzępek Why not(es)? Automatic analysis of notes for consecutive interpreting training Biernacka Agnieszka, Figiel Wojciech (Ed.): 18 (12), pp. 245-268, Peter Lang Verlag, Berlin, Bruxelles, Chennai, Lausanne, New York, Oxford, 2024, ISBN: 9783631907122. @inbook{UAM3e12f04642694835a7c486a6658d9b64, title = {Why not(es)? Automatic analysis of notes for consecutive interpreting training}, author = {Anna Jelec and Karol Bartkiewicz and Katarzyna Stachowiak-Szymczak and Joanna Ziobro-Strzępek}, editor = {Biernacka Agnieszka, Figiel Wojciech}, url = {https://www.peterlang.com/document/1370692}, doi = {10.3726/b21104}, isbn = {9783631907122}, year = {2024}, date = {2024-07-01}, journal = {Phys. Rev. Res.}, volume = {18}, number = {12}, pages = {245-268}, publisher = {Peter Lang Verlag}, address = {Berlin, Bruxelles, Chennai, Lausanne, New York, Oxford}, series = {Studies in Language, Culture and Society: New Insights into Interpreting Studies}, abstract = {This volume is a collective work of eighteen eminent researchers representing various sub-fields of Interpreting Studies who contribute with fourteen chapters. The topics include various areas and approaches: interpreting from a philosophical, sociological and historical perspective, ethics of interpreters, court interpreting, public service interpreting, signed language interpreting, interpreting for minors and for refugees and asylum seekers, note-taking in consecutive interpreting, accessibility, as well as technology in interpreting and interpreter training. The multiplicity of themes and the multifaceted nature of the research prove that Interpreting Studies is nowadays a field that combines different disciplines and methodologies.}, type = {book}, keywords = {}, pubstate = {published}, tppubtype = {inbook} } This volume is a collective work of eighteen eminent researchers representing various sub-fields of Interpreting Studies who contribute with fourteen chapters. The topics include various areas and approaches: interpreting from a philosophical, sociological and historical perspective, ethics of interpreters, court interpreting, public service interpreting, signed language interpreting, interpreting for minors and for refugees and asylum seekers, note-taking in consecutive interpreting, accessibility, as well as technology in interpreting and interpreter training. The multiplicity of themes and the multifaceted nature of the research prove that Interpreting Studies is nowadays a field that combines different disciplines and methodologies. |
| 73. | Yunlan Zuo, Ya-Feng Jiao, Xun-Wei Xu, Adam Miranowicz, Le-Man Kuang, Hui Jing Chiral photon blockade in the spinning Kerr resonator Opt. Express, 32 (12), pp. 22020–22030, 2024. @article{Zuo2024, title = {Chiral photon blockade in the spinning Kerr resonator}, author = {Yunlan Zuo and Ya-Feng Jiao and Xun-Wei Xu and Adam Miranowicz and Le-Man Kuang and Hui Jing}, url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-32-12-22020}, doi = {10.1364/OE.524680}, year = {2024}, date = {2024-06-01}, journal = {Opt. Express}, volume = {32}, number = {12}, pages = {22020--22030}, publisher = {Optica Publishing Group}, abstract = {We propose how to achieve chiral photon blockade by spinning a nonlinear optical resonator. We show that by driving such a device at a fixed direction, completely different quantum effects can emerge for the counter-propagating optical modes, due to the spinning-induced breaking of time-reversal symmetry, which otherwise is unattainable for the same device in the static regime. Also, we find that in comparison with the static case, robust non-classical correlations against random backscattering losses can be achieved for such a quantum chiral system. Our work, extending previous works on the spontaneous breaking of optical chiral symmetry from the classical to purely quantum regimes, can stimulate more efforts towards making and utilizing various chiral quantum effects, including applications for chiral quantum networks or noise-tolerant quantum sensors.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We propose how to achieve chiral photon blockade by spinning a nonlinear optical resonator. We show that by driving such a device at a fixed direction, completely different quantum effects can emerge for the counter-propagating optical modes, due to the spinning-induced breaking of time-reversal symmetry, which otherwise is unattainable for the same device in the static regime. Also, we find that in comparison with the static case, robust non-classical correlations against random backscattering losses can be achieved for such a quantum chiral system. Our work, extending previous works on the spontaneous breaking of optical chiral symmetry from the classical to purely quantum regimes, can stimulate more efforts towards making and utilizing various chiral quantum effects, including applications for chiral quantum networks or noise-tolerant quantum sensors. |
| 72. | Deng-Gao Lai, Adam Miranowicz, Franco Nori Phys. Rev. Lett., 132 , pp. 243602, 2024. @article{Lai24prl, title = {Nonreciprocal Topological Phonon Transfer Independent of Both Device Mass and Exceptional-Point Encircling Direction}, author = {Deng-Gao Lai and Adam Miranowicz and Franco Nori}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.132.243602}, doi = {10.1103/PhysRevLett.132.243602}, year = {2024}, date = {2024-06-01}, journal = {Phys. Rev. Lett.}, volume = {132}, pages = {243602}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 71. | Deng-Gao Lai, C -H Wang, B -P Hou, Adam Miranowicz, Franco Nori Exceptional refrigeration of motions beyond their mass and temperature limitations Optica, 11 (4), pp. 485–491, 2024. @article{Lai2024b, title = {Exceptional refrigeration of motions beyond their mass and temperature limitations}, author = {Deng-Gao Lai and C -H Wang and B -P Hou and Adam Miranowicz and Franco Nori}, url = {https://opg.optica.org/optica/abstract.cfm?URI=optica-11-4-485}, doi = {10.1364/OPTICA.495199}, year = {2024}, date = {2024-04-01}, journal = {Optica}, volume = {11}, number = {4}, pages = {485--491}, publisher = {Optica Publishing Group}, abstract = {Coaxing vibrations in the regimes of both large mass and high temperature into their motional quantum ground states is extremely challenging, because it requires an ultra-high optical power, which introduces extraneous excessive heating and intricate instabilities. Here we propose how to overcome these obstacles and cool vibrational networks by simply harnessing the power of an exceptional point (EP) induced in parity-time symmetric structures; and we reveal its exceptional cooling properties otherwise unachievable in conventional devices. In stark contrast to standard-cooling protocols, a three orders-of-magnitude amplification in net cooling rates arises from the EP-cooling mechanism, without which it vanishes. Remarkably, our EP cooling is nearly immune to both resonator mass and environmental temperature, and this overthrows the consensus that poor intrinsic factors and rugged extrinsic environment suppress cooling channels. Our study offers the possibility of isolating and engineering motional properties of large-mass and high-temperature objects for various applications in optical and acoustic sensing, gravimetry, and inertial navigation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Coaxing vibrations in the regimes of both large mass and high temperature into their motional quantum ground states is extremely challenging, because it requires an ultra-high optical power, which introduces extraneous excessive heating and intricate instabilities. Here we propose how to overcome these obstacles and cool vibrational networks by simply harnessing the power of an exceptional point (EP) induced in parity-time symmetric structures; and we reveal its exceptional cooling properties otherwise unachievable in conventional devices. In stark contrast to standard-cooling protocols, a three orders-of-magnitude amplification in net cooling rates arises from the EP-cooling mechanism, without which it vanishes. Remarkably, our EP cooling is nearly immune to both resonator mass and environmental temperature, and this overthrows the consensus that poor intrinsic factors and rugged extrinsic environment suppress cooling channels. Our study offers the possibility of isolating and engineering motional properties of large-mass and high-temperature objects for various applications in optical and acoustic sensing, gravimetry, and inertial navigation. |
| 70. | Chia-Yi Ju, Adam Miranowicz, Yueh-Nan Chen, Guang-Yin Chen, Franco Nori Emergent parallel transport and curvature in Hermitian and non-Hermitian quantum mechanics Quantum, 8 , pp. 1277, 2024. @article{Ju2024, title = {Emergent parallel transport and curvature in Hermitian and non-Hermitian quantum mechanics}, author = {Chia-Yi Ju and Adam Miranowicz and Yueh-Nan Chen and Guang-Yin Chen and Franco Nori}, url = {https://quantum-journal.org/papers/q-2024-03-13-1277/}, doi = {10.22331/q-2024-03-13-1277}, year = {2024}, date = {2024-03-13}, journal = {Quantum}, volume = {8}, pages = {1277}, abstract = {Studies have shown that the Hilbert spaces of non-Hermitian systems require nontrivial metrics. Here, we demonstrate how evolution dimensions, in addition to time, can emerge naturally from a geometric formalism. Specifically, in this formalism, Hamiltonians can be interpreted as a Christoffel symbol-like operators, and the Schroedinger equation as a parallel transport in this formalism. We then derive the evolution equations for the states and metrics along the emergent dimensions and find that the curvature of the Hilbert space bundle for any given closed system is locally flat. Finally, we show that the fidelity susceptibilities and the Berry curvatures of states are related to these emergent parallel transports.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Studies have shown that the Hilbert spaces of non-Hermitian systems require nontrivial metrics. Here, we demonstrate how evolution dimensions, in addition to time, can emerge naturally from a geometric formalism. Specifically, in this formalism, Hamiltonians can be interpreted as a Christoffel symbol-like operators, and the Schroedinger equation as a parallel transport in this formalism. We then derive the evolution equations for the states and metrics along the emergent dimensions and find that the curvature of the Hilbert space bundle for any given closed system is locally flat. Finally, we show that the fidelity susceptibilities and the Berry curvatures of states are related to these emergent parallel transports. |
| 69. | Arnab Laha, Adam Miranowicz, R. K. Varshney, Somnath Ghosh Correlated nonreciprocity around conjugate exceptional points Phys. Rev. A, 109 , pp. 033511, 2024. @article{Laha2024, title = {Correlated nonreciprocity around conjugate exceptional points}, author = {Arnab Laha and Adam Miranowicz and R. K. Varshney and Somnath Ghosh}, url = {https://link.aps.org/doi/10.1103/PhysRevA.109.033511}, doi = {10.1103/PhysRevA.109.033511}, year = {2024}, date = {2024-03-08}, journal = {Phys. Rev. A}, volume = {109}, pages = {033511}, abstract = {The occurrence of exceptional points (EPs) is a fascinating non-Hermitian feature of open systems. A level-repulsion phenomenon between two complex states of an open system can be realized by positioning an EP and its time-reversal ( T ) conjugate pair in the underlying parameter space. Here, we report interesting nonreciprocal responses of such two conjugate EPs by using a dual-mode planar waveguide system having two T -symmetric active variants concerning the transverse gain-loss profiles. We specifically reveal an all-optical scheme to achieve correlative nonreciprocal light dynamics by using the reverse chirality of two dynamically encircled conjugate EPs in the presence of local nonlinearity. A specific nonreciprocal correlation between two designed T -symmetric waveguide variants is established in terms of their unidirectional transfer of light with a precise selection of modes. Here, the unconventional reverse chiral properties of two conjugate EPs allow the nonreciprocal transmission of two selective modes in the opposite directions of the underlying waveguide variants. An explicit dependence of the nonlinearity level on a significant enhancement of the nonreciprocity in terms of an isolation ratio is explored by investigating the effects of both local Kerr-type and saturable nonlinearities (considered separately). The physical insights and implications of harnessing the features of conjugate EPs in nonlinear optical systems can enable the growth and development of a versatile platform for building nonreciprocal components and devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The occurrence of exceptional points (EPs) is a fascinating non-Hermitian feature of open systems. A level-repulsion phenomenon between two complex states of an open system can be realized by positioning an EP and its time-reversal ( T ) conjugate pair in the underlying parameter space. Here, we report interesting nonreciprocal responses of such two conjugate EPs by using a dual-mode planar waveguide system having two T -symmetric active variants concerning the transverse gain-loss profiles. We specifically reveal an all-optical scheme to achieve correlative nonreciprocal light dynamics by using the reverse chirality of two dynamically encircled conjugate EPs in the presence of local nonlinearity. A specific nonreciprocal correlation between two designed T -symmetric waveguide variants is established in terms of their unidirectional transfer of light with a precise selection of modes. Here, the unconventional reverse chiral properties of two conjugate EPs allow the nonreciprocal transmission of two selective modes in the opposite directions of the underlying waveguide variants. An explicit dependence of the nonlinearity level on a significant enhancement of the nonreciprocity in terms of an isolation ratio is explored by investigating the effects of both local Kerr-type and saturable nonlinearities (considered separately). The physical insights and implications of harnessing the features of conjugate EPs in nonlinear optical systems can enable the growth and development of a versatile platform for building nonreciprocal components and devices. |
| 68. | Wei Qin, Adam Miranowicz, Franco Nori Proposal of ensemble qubits with two-atom decay New Journal of Physics, 26 , pp. 033006, 2024. @article{Qin2024, title = {Proposal of ensemble qubits with two-atom decay}, author = {Wei Qin and Adam Miranowicz and Franco Nori}, url = {https://iopscience.iop.org/article/10.1088/1367-2630/ad2bad}, doi = {10.1088/1367-2630/ad2bad}, year = {2024}, date = {2024-03-08}, journal = {New Journal of Physics}, volume = {26}, pages = {033006}, abstract = {We propose and analyze a novel approach to implement ensemble qubits. The required anharmonicity is provided by a simultaneous decay of two atoms (i.e. two-atom decay), which is achieved by fully quantum degenerate parametric amplification. For an atomic ensemble, the two-atom decay generates and stabilizes a 2D quantum manifold, which is spanned by the ground and single-excited superradiant states. Moreover, this nonlinear decay process can strongly suppress transitions to higher-excited superradiant states, and convert residual transitions into an effective decay from the single-excitation superradiant state to the ground state. Our method does not require Rydberg dipole blockade and, thus, strong atom-atom interactions, compared to previous work. This indicates that it can be applied to typical atomic or spin ensembles in simple experimental setups. Remarkably, our idea is compatible with the cavity protection mechanism, and therefore spin dephasing due to inhomogeneous broadening can be strongly suppressed. The presented ensemble qubit provides a new platform for quantum information processing, and also extends the range of applications of atomic or spin ensembles.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We propose and analyze a novel approach to implement ensemble qubits. The required anharmonicity is provided by a simultaneous decay of two atoms (i.e. two-atom decay), which is achieved by fully quantum degenerate parametric amplification. For an atomic ensemble, the two-atom decay generates and stabilizes a 2D quantum manifold, which is spanned by the ground and single-excited superradiant states. Moreover, this nonlinear decay process can strongly suppress transitions to higher-excited superradiant states, and convert residual transitions into an effective decay from the single-excitation superradiant state to the ground state. Our method does not require Rydberg dipole blockade and, thus, strong atom-atom interactions, compared to previous work. This indicates that it can be applied to typical atomic or spin ensembles in simple experimental setups. Remarkably, our idea is compatible with the cavity protection mechanism, and therefore spin dephasing due to inhomogeneous broadening can be strongly suppressed. The presented ensemble qubit provides a new platform for quantum information processing, and also extends the range of applications of atomic or spin ensembles. |
| 67. | Marek Kopciuch, Magdalena Smolis, Adam Miranowicz, Szymon Pustelny Optimized optical tomography of quantum states of a room-temperature alkali-metal vapor Phys. Rev. A, 109 , pp. 032402, 2024. @article{Kopciuch2024, title = {Optimized optical tomography of quantum states of a room-temperature alkali-metal vapor}, author = {Marek Kopciuch and Magdalena Smolis and Adam Miranowicz and Szymon Pustelny}, url = {https://link.aps.org/doi/10.1103/PhysRevA.109.032402}, doi = {10.1103/PhysRevA.109.032402}, year = {2024}, date = {2024-03-01}, journal = {Phys. Rev. A}, volume = {109}, pages = {032402}, abstract = {We demonstrate an experimental technique for the quantum-state tomography of the collective qutrit states of a room-temperature alkali-metal vapor. It is based on the measurements of the polarization of light traversing the vapor subjected to a magnetic field. To assess the technique's robustness against errors, experimental investigations are supported with numerical simulations. This not only allows us to determine the fidelity of the reconstructed states, but also to analyze the quality of the reconstruction for specific experimental parameters, such as light tuning and the number of measurements. By utilizing the conditional number, we demonstrate that the reconstruction robustness can be optimized by a proper adjustment of experimental parameters, and further improvement is possible with the repetition of specific measurements. Our results demonstrate the potential of this high-fidelity reconstruction method of quantum states of room-temperature atomic vapors.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We demonstrate an experimental technique for the quantum-state tomography of the collective qutrit states of a room-temperature alkali-metal vapor. It is based on the measurements of the polarization of light traversing the vapor subjected to a magnetic field. To assess the technique's robustness against errors, experimental investigations are supported with numerical simulations. This not only allows us to determine the fidelity of the reconstructed states, but also to analyze the quality of the reconstruction for specific experimental parameters, such as light tuning and the number of measurements. By utilizing the conditional number, we demonstrate that the reconstruction robustness can be optimized by a proper adjustment of experimental parameters, and further improvement is possible with the repetition of specific measurements. Our results demonstrate the potential of this high-fidelity reconstruction method of quantum states of room-temperature atomic vapors. |
| 66. | Ye-Hong Chen, Yuan Qiu, Adam Miranowicz, Neill Lambert, Wei Qin, Roberto Stassi, Yan Xia, Shi-Biao Zheng, Franco Nori Sudden change of the photon output field marks phase transitions in the quantum Rabi model Communications Physics, 7 (5), 2024. @article{Chen2024, title = {Sudden change of the photon output field marks phase transitions in the quantum Rabi model}, author = {Ye-Hong Chen and Yuan Qiu and Adam Miranowicz and Neill Lambert and Wei Qin and Roberto Stassi and Yan Xia and Shi-Biao Zheng and Franco Nori}, url = {https://www.nature.com/articles/s42005-023-01457-w}, doi = {10.1038/s42005-023-01457-w}, year = {2024}, date = {2024-01-05}, journal = {Communications Physics}, volume = {7}, number = {5}, abstract = {The experimental observation of quantum phase transitions predicted by the quantum Rabi model in quantum critical systems is usually challenging due to the lack of signature experimental observables associated with them. Here, we describe a method to identify the dynamical critical phenomenon in the quantum Rabi model consisting of a three-level atom and a cavity at the quantum phase transition. Such a critical phenomenon manifests itself as a sudden change of steady-state output photons in the system driven by two classical fields, when both the atom and the cavity are initially unexcited. The process occurs as the high-frequency pump field is converted into the low-frequency Stokes field and multiple cavity photons in the normal phase, while this conversion cannot occur in the superradiant phase. The sudden change of steady-state output photons is an experimentally accessible measure to probe quantum phase transitions, as it does not require preparing the equilibrium state.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The experimental observation of quantum phase transitions predicted by the quantum Rabi model in quantum critical systems is usually challenging due to the lack of signature experimental observables associated with them. Here, we describe a method to identify the dynamical critical phenomenon in the quantum Rabi model consisting of a three-level atom and a cavity at the quantum phase transition. Such a critical phenomenon manifests itself as a sudden change of steady-state output photons in the system driven by two classical fields, when both the atom and the cavity are initially unexcited. The process occurs as the high-frequency pump field is converted into the low-frequency Stokes field and multiple cavity photons in the normal phase, while this conversion cannot occur in the superradiant phase. The sudden change of steady-state output photons is an experimentally accessible measure to probe quantum phase transitions, as it does not require preparing the equilibrium state. |
| 65. | Josef Kadlec, Karol Bartkiewicz, Antonín Černoch, Karel Lemr, Adam Miranowicz Opt. Express, 32 (2), pp. 2333–2346, 2024. @article{Kadlec:24, title = {Experimental hierarchy of the nonclassicality of single-qubit states via potentials for entanglement, steering, and Bell nonlocality}, author = {Josef Kadlec and Karol Bartkiewicz and Antonín Černoch and Karel Lemr and Adam Miranowicz}, url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-32-2-2333}, doi = {10.1364/OE.506169}, year = {2024}, date = {2024-01-01}, journal = {Opt. Express}, volume = {32}, number = {2}, pages = {2333--2346}, publisher = {Optica Publishing Group}, abstract = {Entanglement potentials are a promising way to quantify the nonclassicality of single-mode states. They are defined by the amount of entanglement (expressed by, e.g., the Wootters concurrence) obtained after mixing the examined single-mode state with a purely classical state; such as the vacuum or a coherent state. We generalize the idea of entanglement potentials to other quantum correlations: the EPR steering and Bell nonlocality, thus enabling us to study mutual hierarchies of these nonclassicality potentials. Instead of the usual vacuum and one-photon superposition states, we experimentally test this concept using specially tailored polarization-encoded single-photon states. One polarization encodes a given nonclassical single-mode state, while the other serves as the vacuum place-holder. This technique proves to be experimentally more convenient in comparison to the vacuum and a one-photon superposition as it does not require the vacuum detection.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Entanglement potentials are a promising way to quantify the nonclassicality of single-mode states. They are defined by the amount of entanglement (expressed by, e.g., the Wootters concurrence) obtained after mixing the examined single-mode state with a purely classical state; such as the vacuum or a coherent state. We generalize the idea of entanglement potentials to other quantum correlations: the EPR steering and Bell nonlocality, thus enabling us to study mutual hierarchies of these nonclassicality potentials. Instead of the usual vacuum and one-photon superposition states, we experimentally test this concept using specially tailored polarization-encoded single-photon states. One polarization encodes a given nonclassical single-mode state, while the other serves as the vacuum place-holder. This technique proves to be experimentally more convenient in comparison to the vacuum and a one-photon superposition as it does not require the vacuum detection. |
| 64. | Wei Qin, Anton Frisk Kockum, Carlos Sánchez Munoz, Adam Miranowicz, Franco Nori Quantum amplification and simulation of strong and ultrastrong coupling of light and matter Physics Reports, 1078 , pp. 1-59, 2024, ISSN: 0370-1573, (Quantum amplification and simulation of strong and ultrastrong coupling of light and matter). @article{Qin2024pr, title = {Quantum amplification and simulation of strong and ultrastrong coupling of light and matter}, author = {Wei Qin and Anton Frisk Kockum and Carlos Sánchez Munoz and Adam Miranowicz and Franco Nori}, url = {https://www.sciencedirect.com/science/article/pii/S0370157324001571}, doi = {https://doi.org/10.1016/j.physrep.2024.05.003}, issn = {0370-1573}, year = {2024}, date = {2024-01-01}, journal = {Physics Reports}, volume = {1078}, pages = {1-59}, abstract = {The interaction of light and matter at the single-photon level is of central importance in various fields of physics, including, e.g., condensed matter physics, astronomy, quantum optics, and quantum information. Amplification of such quantum lightmatter interaction can be highly beneficial to, e.g., improve device performance, explore novel phenomena, and understand fundamental physics, and has therefore been a long-standing goal. Furthermore, simulation of lightmatter interaction in the regime of ultrastrong coupling, where the interaction strength is comparable to the bare frequencies of the uncoupled systems, has also become a hot research topic, and considerable progress has been made both theoretically and experimentally in the past decade. In this review, we provide a detailed introduction of recent advances in amplification of quantum lightmatter interaction and simulation of ultrastrong lightmatter interaction, particularly in cavity and circuit quantum electrodynamics and in cavity optomechanics.}, note = {Quantum amplification and simulation of strong and ultrastrong coupling of light and matter}, keywords = {}, pubstate = {published}, tppubtype = {article} } The interaction of light and matter at the single-photon level is of central importance in various fields of physics, including, e.g., condensed matter physics, astronomy, quantum optics, and quantum information. Amplification of such quantum lightmatter interaction can be highly beneficial to, e.g., improve device performance, explore novel phenomena, and understand fundamental physics, and has therefore been a long-standing goal. Furthermore, simulation of lightmatter interaction in the regime of ultrastrong coupling, where the interaction strength is comparable to the bare frequencies of the uncoupled systems, has also become a hot research topic, and considerable progress has been made both theoretically and experimentally in the past decade. In this review, we provide a detailed introduction of recent advances in amplification of quantum lightmatter interaction and simulation of ultrastrong lightmatter interaction, particularly in cavity and circuit quantum electrodynamics and in cavity optomechanics. |
| 63. | Jan Roik, Karol Bartkiewicz, Antonín Černoch, Karel Lemr Routing in quantum communication networks using reinforcement machine learning Quantum Information Processing, 23 (3), 2024, ISSN: 1573-1332. @article{Roik2024, title = {Routing in quantum communication networks using reinforcement machine learning}, author = {Jan Roik and Karol Bartkiewicz and Antonín Černoch and Karel Lemr}, url = {http://dx.doi.org/10.1007/s11128-024-04287-z}, doi = {10.1007/s11128-024-04287-z}, issn = {1573-1332}, year = {2024}, date = {2024-01-01}, journal = {Quantum Information Processing}, volume = {23}, number = {3}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 62. | Seungbeom Chin, Yong-Su Kim, Marcin Karczewski Shortcut to multipartite entanglement generation: A graph approach to boson subtractions npj Quantum Information, 10 (1), 2024, ISSN: 2056-6387. @article{Chin2024, title = {Shortcut to multipartite entanglement generation: A graph approach to boson subtractions}, author = {Seungbeom Chin and Yong-Su Kim and Marcin Karczewski}, url = {http://dx.doi.org/10.1038/s41534-024-00845-6}, doi = {10.1038/s41534-024-00845-6}, issn = {2056-6387}, year = {2024}, date = {2024-01-01}, journal = {npj Quantum Information}, volume = {10}, number = {1}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 61. | Jolanta Natalia Latosińska, Magdalena Latosińska, Janez Seliger, Veselko Žagar, Tomaž Apih Pharmaceuticals, 17 (4), 2024, ISSN: 1424-8247. @article{ph17040445, title = {Butterfly Effect in Cytarabine: Combined NMR-NQR Experiment, Solid-State Computational Modeling, Quantitative Structure-Property Relationships and Molecular Docking Study}, author = {Jolanta Natalia Latosińska and Magdalena Latosińska and Janez Seliger and Veselko Žagar and Tomaž Apih}, url = {https://www.mdpi.com/1424-8247/17/4/445}, doi = {10.3390/ph17040445}, issn = {1424-8247}, year = {2024}, date = {2024-01-01}, journal = {Pharmaceuticals}, volume = {17}, number = {4}, abstract = {Cytarabine (Ara-C) is a synthetic isomer of cytidine that differs from cytidine and deoxycytidine only in the sugar. The use of arabinose instead of deoxyribose hinders the formation of phosphodiester linkages between pentoses, preventing the DNA chain from elongation and interrupting the DNA synthesis. The minor structural alteration (the inversion of hydroxyl at the 2′ positions of the sugar) leads to change of the biological activity from anti-depressant and DNA/RNA block builder to powerful anti-cancer. Our study aimed to determine the molecular nature of this phenomenon. Three 1H-14N NMR-NQR experimental techniques, followed by solid-state computational modelling (Quantum Theory of Atoms in Molecules, Reduced Density Gradient and 3D Hirshfeld surfaces), Quantitative Structure–Property Relationships, Spackman’s Hirshfeld surfaces and Molecular Docking were used. Multifaceted analysis—combining experiments, computational modeling and molecular docking—provides deep insight into three-dimensional packing at the atomic and molecular levels, but is challenging. A spectrum with nine lines indicating the existence of three chemically inequivalent nitrogen sites in the Ara-C molecule was recorded, and the lines were assigned to them. The influence of the structural alteration on the NQR parameters was modeled in the solid (GGA/RPBE). For the comprehensive description of the nature of these interactions several factors were considered, including relative reactivity and the involvement of heavy atoms in various non-covalent interactions. The binding modes in the solid state and complex with dCK were investigated using the novel approaches: radial plots, heatmaps and root-mean-square deviation of the binding mode. We identified the intramolecular OH···O hydrogen bond as the key factor responsible for forcing the glycone conformation and strengthening NH···O bonds with Gln97, Asp133 and Ara128, and stacking with Phe137. The titular butterfly effect is associated with both the inversion and the presence of this intramolecular hydrogen bond. Our study elucidates the differences in the binding modes of Ara-C and cytidine, which should guide the design of more potent anti-cancer and anti-viral analogues.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Cytarabine (Ara-C) is a synthetic isomer of cytidine that differs from cytidine and deoxycytidine only in the sugar. The use of arabinose instead of deoxyribose hinders the formation of phosphodiester linkages between pentoses, preventing the DNA chain from elongation and interrupting the DNA synthesis. The minor structural alteration (the inversion of hydroxyl at the 2′ positions of the sugar) leads to change of the biological activity from anti-depressant and DNA/RNA block builder to powerful anti-cancer. Our study aimed to determine the molecular nature of this phenomenon. Three 1H-14N NMR-NQR experimental techniques, followed by solid-state computational modelling (Quantum Theory of Atoms in Molecules, Reduced Density Gradient and 3D Hirshfeld surfaces), Quantitative Structure–Property Relationships, Spackman’s Hirshfeld surfaces and Molecular Docking were used. Multifaceted analysis—combining experiments, computational modeling and molecular docking—provides deep insight into three-dimensional packing at the atomic and molecular levels, but is challenging. A spectrum with nine lines indicating the existence of three chemically inequivalent nitrogen sites in the Ara-C molecule was recorded, and the lines were assigned to them. The influence of the structural alteration on the NQR parameters was modeled in the solid (GGA/RPBE). For the comprehensive description of the nature of these interactions several factors were considered, including relative reactivity and the involvement of heavy atoms in various non-covalent interactions. The binding modes in the solid state and complex with dCK were investigated using the novel approaches: radial plots, heatmaps and root-mean-square deviation of the binding mode. We identified the intramolecular OH···O hydrogen bond as the key factor responsible for forcing the glycone conformation and strengthening NH···O bonds with Gln97, Asp133 and Ara128, and stacking with Phe137. The titular butterfly effect is associated with both the inversion and the presence of this intramolecular hydrogen bond. Our study elucidates the differences in the binding modes of Ara-C and cytidine, which should guide the design of more potent anti-cancer and anti-viral analogues. |
| 60. | Magdalena Latosińska, Jolanta Natalia Latosińska Molecules, 29 (2), pp. 441, 2024, ISSN: 1420-3049. @article{Latosiska2024, title = {Favipiravir Analogues as Inhibitors of SARS-CoV-2 RNA-Dependent RNA Polymerase, Combined Quantum Chemical Modeling, Quantitative Structure–Property Relationship, and Molecular Docking Study}, author = {Magdalena Latosińska and Jolanta Natalia Latosińska}, url = {http://dx.doi.org/10.3390/molecules29020441}, doi = {10.3390/molecules29020441}, issn = {1420-3049}, year = {2024}, date = {2024-01-01}, journal = {Molecules}, volume = {29}, number = {2}, pages = {441}, publisher = {MDPI AG}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 59. | E S Hevorkian, V P Nerubatskyi, R V Vovk, T Szumiata, Jolanta Natalia Latosińska Foamy ceramic filters and new possibilities of their applications Ceramics International, 50 (4), pp. 6961–6968, 2024, ISSN: 0272-8842. @article{Hevorkian2024b, title = {Foamy ceramic filters and new possibilities of their applications}, author = {E S Hevorkian and V P Nerubatskyi and R V Vovk and T Szumiata and Jolanta Natalia Latosińska}, url = {http://dx.doi.org/10.1016/j.ceramint.2023.12.046}, doi = {10.1016/j.ceramint.2023.12.046}, issn = {0272-8842}, year = {2024}, date = {2024-01-01}, journal = {Ceramics International}, volume = {50}, number = {4}, pages = {6961–6968}, publisher = {Elsevier BV}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 58. | Magdalena Latosińska, Jolanta Natalia Latosińska Molecules, 29 (13), 2024, ISSN: 1420-3049. @article{molecules29133199, title = {Serine/Threonine Protein Kinases as Attractive Targets for Anti-Cancer Drugs—An Innovative Approach to Ligand Tuning Using Combined Quantum Chemical Calculations, Molecular Docking, Molecular Dynamic Simulations, and Network-like Similarity Graphs}, author = {Magdalena Latosińska and Jolanta Natalia Latosińska}, url = {https://www.mdpi.com/1420-3049/29/13/3199}, doi = {10.3390/molecules29133199}, issn = {1420-3049}, year = {2024}, date = {2024-01-01}, journal = {Molecules}, volume = {29}, number = {13}, abstract = {Serine/threonine protein kinases (CK2, PIM-1, RIO1) are constitutively active, highly conserved, pleiotropic, and multifunctional kinases, which control several signaling pathways and regulate many cellular functions, such as cell activity, survival, proliferation, and apoptosis. Over the past decades, they have gained increasing attention as potential therapeutic targets, ranging from various cancers and neurological, inflammation, and autoimmune disorders to viral diseases, including COVID-19. Despite the accumulation of a vast amount of experimental data, there is still no “recipe” that would facilitate the search for new effective kinase inhibitors. The aim of our study was to develop an effective screening method that would be useful for this purpose. A combination of Density Functional Theory calculations and molecular docking, supplemented with newly developed quantitative methods for the comparison of the binding modes, provided deep insight into the set of desirable properties responsible for their inhibition. The mathematical metrics helped assess the distance between the binding modes, while heatmaps revealed the locations in the ligand that should be modified according to binding site requirements. The Structure-Binding Affinity Index and Structural-Binding Affinity Landscape proposed in this paper helped to measure the extent to which binding affinity is gained or lost in response to a relatively small change in the ligand’s structure. The combination of the physico-chemical profile with the aforementioned factors enabled the identification of both “dead” and “promising” search directions. Tests carried out on experimental data have validated and demonstrated the high efficiency of the proposed innovative approach. Our method for quantifying differences between the ligands and their binding capabilities holds promise for guiding future research on new anti-cancer agents.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Serine/threonine protein kinases (CK2, PIM-1, RIO1) are constitutively active, highly conserved, pleiotropic, and multifunctional kinases, which control several signaling pathways and regulate many cellular functions, such as cell activity, survival, proliferation, and apoptosis. Over the past decades, they have gained increasing attention as potential therapeutic targets, ranging from various cancers and neurological, inflammation, and autoimmune disorders to viral diseases, including COVID-19. Despite the accumulation of a vast amount of experimental data, there is still no “recipe” that would facilitate the search for new effective kinase inhibitors. The aim of our study was to develop an effective screening method that would be useful for this purpose. A combination of Density Functional Theory calculations and molecular docking, supplemented with newly developed quantitative methods for the comparison of the binding modes, provided deep insight into the set of desirable properties responsible for their inhibition. The mathematical metrics helped assess the distance between the binding modes, while heatmaps revealed the locations in the ligand that should be modified according to binding site requirements. The Structure-Binding Affinity Index and Structural-Binding Affinity Landscape proposed in this paper helped to measure the extent to which binding affinity is gained or lost in response to a relatively small change in the ligand’s structure. The combination of the physico-chemical profile with the aforementioned factors enabled the identification of both “dead” and “promising” search directions. Tests carried out on experimental data have validated and demonstrated the high efficiency of the proposed innovative approach. Our method for quantifying differences between the ligands and their binding capabilities holds promise for guiding future research on new anti-cancer agents. |
| 57. | Edvin Hevorkian, Remigiusz Michalczewski, Miroslaw Rucki, Dmitry Sofronov, Edyta Osuch-Słomka, Volodymyr Nerubatskyi, Zbigniew Krzysiak, Jolanta Natalia Latosińska Ceramics International, 50 (19, Part A), pp. 35226-35235, 2024, ISSN: 0272-8842. @article{HEVORKIAN202435226, title = {Effect of the sintering parameters on the structure and mechanical properties of zirconia-based ceramics}, author = {Edvin Hevorkian and Remigiusz Michalczewski and Miroslaw Rucki and Dmitry Sofronov and Edyta Osuch-Słomka and Volodymyr Nerubatskyi and Zbigniew Krzysiak and Jolanta Natalia Latosińska}, url = {https://www.sciencedirect.com/science/article/pii/S0272884224027688}, doi = {https://doi.org/10.1016/j.ceramint.2024.06.331}, issn = {0272-8842}, year = {2024}, date = {2024-01-01}, journal = {Ceramics International}, volume = {50}, number = {19, Part A}, pages = {35226-35235}, abstract = {The paper presents the results of an investigations of the sintered zirconia ceramics that have been stabilized with Y2O3 and CeO2. The initial powders were synthesized via decomposition of the fluoride salts, which determined morphological features and dimensions of the particles. The specific electroconsolidation process, performed using the modified spark plasma sintering device, allowed for the retention of the nanoscale grain sizes and related properties of the sintered ceramic composites. It was found that the as-obtained materials with cerium oxide exhibited high bending strength of 609 MPa, by ca. 33 % higher than that of yttria-stabilized ones (410 MPa). In turn, the best combination of hardness and fracture toughness, K1С = 5.8 МPа·m1/2 аnd Нv = 14.8 GPа, respectively, exhibited ZrO2+3 wt% Y2O3. This result can be attributed to the chemical composition and morphology of the powders, which in turn is influenced by the synthesis conditions and calcination time and temperatures, as well as to the sintering parameters. In particular, yttria-stabilized zirconia showed higher sensitivity to the variations of the sintering temperatures and holding times.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The paper presents the results of an investigations of the sintered zirconia ceramics that have been stabilized with Y2O3 and CeO2. The initial powders were synthesized via decomposition of the fluoride salts, which determined morphological features and dimensions of the particles. The specific electroconsolidation process, performed using the modified spark plasma sintering device, allowed for the retention of the nanoscale grain sizes and related properties of the sintered ceramic composites. It was found that the as-obtained materials with cerium oxide exhibited high bending strength of 609 MPa, by ca. 33 % higher than that of yttria-stabilized ones (410 MPa). In turn, the best combination of hardness and fracture toughness, K1С = 5.8 МPа·m1/2 аnd Нv = 14.8 GPа, respectively, exhibited ZrO2+3 wt% Y2O3. This result can be attributed to the chemical composition and morphology of the powders, which in turn is influenced by the synthesis conditions and calcination time and temperatures, as well as to the sintering parameters. In particular, yttria-stabilized zirconia showed higher sensitivity to the variations of the sintering temperatures and holding times. |
| 56. | Magdalena Latosińska, Jolanta Natalia Latosińska Viruses, 16 (7), 2024, ISSN: 1999-4915. @article{v16071073, title = {The Chameleon Strategy—A Recipe for Effective Ligand Screening for Viral Targets Based on Four Novel Structure–Binding Strength Indices}, author = {Magdalena Latosińska and Jolanta Natalia Latosińska}, url = {https://www.mdpi.com/1999-4915/16/7/1073}, doi = {10.3390/v16071073}, issn = {1999-4915}, year = {2024}, date = {2024-01-01}, journal = {Viruses}, volume = {16}, number = {7}, abstract = {The RNA viruses SARS-CoV, SARS-CoV-2 and MERS-CoV encode the non-structural Nsp16 (2′-O-methyltransferase) that catalyzes the transfer of a methyl group from S-adenosylmethionine (SAM) to the first ribonucleotide in mRNA. Recently, it has been found that breaking the bond between Nsp16 and SAM substrate results in the cessation of mRNA virus replication. To date, only a limited number of such inhibitors have been identified, which can be attributed to a lack of an effective “recipe”. The aim of our study was to propose and verify a rapid and effective screening protocol dedicated to such purposes. We proposed four new indices describing structure-binding strength (structure–binding affinity, structure–hydrogen bonding, structure–steric and structure–protein–ligand indices) were then applied and shown to be extremely helpful in determining the degree of increase or decrease in binding affinity in response to a relatively small change in the ligand structure. After initial pre-selection, based on similarity to SAM, we limited the study to 967 compounds, so-called molecular chameleons. They were then docked in the Nsp16 protein pocket, and 10 candidate ligands were selected using the novel structure-binding affinity index. Subsequently the selected 10 candidate ligands and 8 known inhibitors and were docked to Nsp16 pockets from SARS-CoV-2, MERS-CoV and SARS-CoV. Based on the four new indices, the best ligands were selected and a new one was designed by tuning them. Finally, ADMET profiling and molecular dynamics simulations were performed for the best ligands. The new structure-binding strength indices can be successfully applied not only to screen and tune ligands, but also to determine the effectiveness of the ligand in response to changes in the target viral entity, which is particularly useful for assessing drug effectiveness in the case of alterations in viral proteins. The developed approach, the so-called chameleon strategy, has the capacity to introduce a novel universal paradigm to the field of drugs design, including RNA antivirals.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The RNA viruses SARS-CoV, SARS-CoV-2 and MERS-CoV encode the non-structural Nsp16 (2′-O-methyltransferase) that catalyzes the transfer of a methyl group from S-adenosylmethionine (SAM) to the first ribonucleotide in mRNA. Recently, it has been found that breaking the bond between Nsp16 and SAM substrate results in the cessation of mRNA virus replication. To date, only a limited number of such inhibitors have been identified, which can be attributed to a lack of an effective “recipe”. The aim of our study was to propose and verify a rapid and effective screening protocol dedicated to such purposes. We proposed four new indices describing structure-binding strength (structure–binding affinity, structure–hydrogen bonding, structure–steric and structure–protein–ligand indices) were then applied and shown to be extremely helpful in determining the degree of increase or decrease in binding affinity in response to a relatively small change in the ligand structure. After initial pre-selection, based on similarity to SAM, we limited the study to 967 compounds, so-called molecular chameleons. They were then docked in the Nsp16 protein pocket, and 10 candidate ligands were selected using the novel structure-binding affinity index. Subsequently the selected 10 candidate ligands and 8 known inhibitors and were docked to Nsp16 pockets from SARS-CoV-2, MERS-CoV and SARS-CoV. Based on the four new indices, the best ligands were selected and a new one was designed by tuning them. Finally, ADMET profiling and molecular dynamics simulations were performed for the best ligands. The new structure-binding strength indices can be successfully applied not only to screen and tune ligands, but also to determine the effectiveness of the ligand in response to changes in the target viral entity, which is particularly useful for assessing drug effectiveness in the case of alterations in viral proteins. The developed approach, the so-called chameleon strategy, has the capacity to introduce a novel universal paradigm to the field of drugs design, including RNA antivirals. |
| 55. | Jan Wójcik Quantum walks in weak stochastic gauge fields Physics Letters A, 512 , pp. 129605, 2024, ISSN: 0375-9601. @article{WOJCIK2024129605, title = {Quantum walks in weak stochastic gauge fields}, author = {Jan Wójcik}, url = {https://www.sciencedirect.com/science/article/pii/S0375960124002998}, doi = {https://doi.org/10.1016/j.physleta.2024.129605}, issn = {0375-9601}, year = {2024}, date = {2024-01-01}, journal = {Physics Letters A}, volume = {512}, pages = {129605}, abstract = {Contrary to the ballistic dynamics of standard quantum walks, the behavior of stochastic quantum walks is known to be diffusive. Here we study discrete time quantum walks in weak stochastic gauge fields. In the case of position and spin dependent gauge field, we observe a transition from ballistic to diffusive motion, with the probability distribution becoming Gaussian. However, in contradiction to common belief, weak stochastic electric gauge fields reveal the persistence of Bloch oscillations despite decoherence which we demonstrate on simulations and prove analytically. The proposed models provide insights into the interplay between randomness and coherent dynamics of quantum walks.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Contrary to the ballistic dynamics of standard quantum walks, the behavior of stochastic quantum walks is known to be diffusive. Here we study discrete time quantum walks in weak stochastic gauge fields. In the case of position and spin dependent gauge field, we observe a transition from ballistic to diffusive motion, with the probability distribution becoming Gaussian. However, in contradiction to common belief, weak stochastic electric gauge fields reveal the persistence of Bloch oscillations despite decoherence which we demonstrate on simulations and prove analytically. The proposed models provide insights into the interplay between randomness and coherent dynamics of quantum walks. |
2023 |
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| 54. | Andrzej Grudka, Paweł Kurzyński, Adam S Sajna, Jan Wójcik, Antoni Wójcik Exposing hypersensitivity in quantum chaotic dynamics Phys. Rev. E, 108 , pp. 064212, 2023. @article{PhysRevE.108.064212, title = {Exposing hypersensitivity in quantum chaotic dynamics}, author = {Andrzej Grudka and Paweł Kurzyński and Adam S Sajna and Jan Wójcik and Antoni Wójcik}, url = {https://link.aps.org/doi/10.1103/PhysRevE.108.064212}, doi = {10.1103/PhysRevE.108.064212}, year = {2023}, date = {2023-12-01}, journal = {Phys. Rev. E}, volume = {108}, pages = {064212}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 53. | Javid Naikoo, Ravindra W. Chhajlany, Jan Kołodyński Multiparameter Estimation Perspective on Non-Hermitian Singularity-Enhanced Sensing Phys. Rev. Lett., 131 , pp. 220801, 2023. @article{PhysRevLett.131.220801, title = {Multiparameter Estimation Perspective on Non-Hermitian Singularity-Enhanced Sensing}, author = {Javid Naikoo and Ravindra W. Chhajlany and Jan Kołodyński}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.131.220801}, doi = {10.1103/PhysRevLett.131.220801}, year = {2023}, date = {2023-11-29}, journal = {Phys. Rev. Lett.}, volume = {131}, pages = {220801}, publisher = {American Physical Society}, abstract = {Describing the evolution of quantum systems by means of non-Hermitian generators opens a new avenue to explore the dynamical properties naturally emerging in such a picture, e.g. operation at the so-called exceptional points, preservation of parity-time symmetry, or capitalizing on the singular behavior of the dynamics. In this Letter, we focus on the possibility of achieving unbounded sensitivity when using the system to sense linear perturbations away from a singular point. By combining multiparameter estimation theory of Gaussian quantum systems with the one of singular-matrix perturbations, we introduce the necessary tools to study the ultimate limits on the precision attained by such singularity-tuned sensors. We identify under what conditions and at what rate can the resulting sensitivity indeed diverge, in order to show that nuisance parameters should be generally included in the analysis, as their presence may alter the scaling of the error with the estimated parameter.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Describing the evolution of quantum systems by means of non-Hermitian generators opens a new avenue to explore the dynamical properties naturally emerging in such a picture, e.g. operation at the so-called exceptional points, preservation of parity-time symmetry, or capitalizing on the singular behavior of the dynamics. In this Letter, we focus on the possibility of achieving unbounded sensitivity when using the system to sense linear perturbations away from a singular point. By combining multiparameter estimation theory of Gaussian quantum systems with the one of singular-matrix perturbations, we introduce the necessary tools to study the ultimate limits on the precision attained by such singularity-tuned sensors. We identify under what conditions and at what rate can the resulting sensitivity indeed diverge, in order to show that nuisance parameters should be generally included in the analysis, as their presence may alter the scaling of the error with the estimated parameter. |
| 52. | Andrzej Grudka, Jȩdrzej Stempin, Jan Wójcik, Antoni Wójcik Superluminal observers do not explain quantum superpositions Physics Letters A, 487 , pp. 129127, 2023. @article{Grudka2023, title = {Superluminal observers do not explain quantum superpositions}, author = {Andrzej Grudka and Jȩdrzej Stempin and Jan Wójcik and Antoni Wójcik}, url = {https://www.sciencedirect.com/science/article/pii/S0375960123005078}, doi = {10.1016/j.physleta.2023.129127}, year = {2023}, date = {2023-11-05}, journal = {Physics Letters A}, volume = {487}, pages = {129127}, abstract = {The quantum description of reality is quite different from the classical one. Understanding this difference at a fundamental level is still an interesting topic. Recently, Dragan and Ekert (2020) postulated that considering so-called superluminal observers can be useful in this context. In particular, they claim that the full mathematical structure of the generalized Lorentz transformation may imply the emergence of multiple quantum mechanical trajectories. On the contrary, here we show that the generalized Lorentz transformation, when used in a consistent way, does not provide any correspondence between the classical concept of a definite path and the multiple paths of quantum mechanics.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The quantum description of reality is quite different from the classical one. Understanding this difference at a fundamental level is still an interesting topic. Recently, Dragan and Ekert (2020) postulated that considering so-called superluminal observers can be useful in this context. In particular, they claim that the full mathematical structure of the generalized Lorentz transformation may imply the emergence of multiple quantum mechanical trajectories. On the contrary, here we show that the generalized Lorentz transformation, when used in a consistent way, does not provide any correspondence between the classical concept of a definite path and the multiple paths of quantum mechanics. |