Fermionic one-body entanglement as a thermodynamic resource
Dr. Krzysztof Ptaszyński, IFM PAN

Date, Time
27.04, 15:00 - 16:00

There is ongoing controversy about whether a coherent superposition of the
occupied states of two fermionic modes should be regarded entangled or
not, that is, whether its intrinsic quantum correlations are operationally
accessible and useful as a resource. This has been questioned on the basis
that such an entanglement cannot be accessed by local operations on
individual modes due to the parity superselection rule which constrains
the set of physical observables. In other words, one cannot observe
violations of Bell’s inequality. In this talk, I summarize results of our
work [1] showing that entanglement of a two-mode fermionic state can be
used as a genuine quantum resource in open-system thermodynamic processes,
enabling one to perform tasks forbidden for separable states. This
demonstrates that quantum thermodynamics can shed light on the nature of
fermionic entanglement and the operational meaning of the different
notions used to define it.

References
[1] K. Ptaszyński, M. Esposito, Phys. Rev. Lett. 130, 150201 (2023).