A non-equilibrium quantum Landauer principle
arXiv:1402.4499 · doi:10.1103/PhysRevLett.114.060602
Abstract
Using the operational framework of completely positive, trace preserving operations and thermodynamic fluctuation relations, we derive a lower bound for the heat exchange in a Landauer erasure process on a quantum system. Our bound comes from a non-phenomenological derivation of the Landauer principle which holds for generic non-equilibrium dynamics. Furthermore the bound depends on the non-unitality of dynamics, giving it a physical significance that differs from other derivations. We apply our framework to the model of a spin-1/2 system coupled to an interacting spin chain at finite temperature.
4 pages, 2 figures, RevTeX4-1; Accepted for publication in Phys. Rev. Lett
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