Nonequilibrium quantum Landauer principle

John Goold, Mauro Paternostro, Kavan Modi

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55 Citations (Scopus)


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 nonphenomenological derivation of the Landauer principle which holds for generic nonequilibrium dynamics. Furthermore, the bound depends on the nonunitality 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.
Original languageEnglish
Article number060602
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 2015

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