Nonequilibrium Quantum Landauer Principle

John Goold*, Mauro Paternostro, Kavan Modi

*Corresponding author for this work

Research output: Contribution to journalArticle

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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 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
Number of pages5
JournalPhysical Review Letters
Volume114
Issue number6
Early online date09 Feb 2015
DOIs
Publication statusPublished - 13 Feb 2015

Keywords

  • FREE-ENERGY DIFFERENCES
  • FLUCTUATION RELATIONS
  • COMPUTATION
  • IRREVERSIBILITY
  • THERMODYNAMICS

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