On the role of initial coherence in the spin phase-space entropy production rate

Giorgio Zicari*, Barış Çakmak, Özgür E. Müstecaplıoğlu, Mauro Paternostro

*Corresponding author for this work

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Abstract

Recent studies have pointed out the intrinsic dependence of figures of merit of thermodynamic relevance—such as work, heat and entropy production—on the amount of quantum coherences that is made available to a system. However, whether coherences hinder or enhance the value taken by such quantifiers of thermodynamic performance is yet to be ascertained. We show that, when considering entropy production generated in a process taking a finite-size bipartite quantum system out of equilibrium through local non-unitary channels, no general monotonicity relationship exists between the entropy production and degree of quantum coherence in the state of the system. A direct correspondence between such quantities can be retrieved when considering specific forms of open-system dynamics applied to suitably chosen initial states. Our results call for a systematic study of the role of genuine quantum features in the non-equilibrium thermodynamics of quantum processes.
Original languageEnglish
Article number013030
Number of pages13
JournalNew Journal of Physics
Volume25
Issue number1
DOIs
Publication statusPublished - 31 Jan 2023

Keywords

  • open quantum system
  • entropy production
  • spin coherent states
  • quantum coherence
  • quantum thermodynamics

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