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Energetics of correlations in interacting systems

Nicolai Friis1,*, Marcus Huber2,3,4,†, and Martí Perarnau-Llobet4,‡

  • 1Institute for Theoretical Physics, University of Innsbruck, Technikerstraße 21a, A-6020 Innsbruck, Austria
  • 2Group of Applied Physics, University of Geneva, 1211 Geneva 4, Switzerland
  • 3Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
  • 4ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain

  • *nicolai.friis@uibk.ac.at
  • †marcus.huber@univie.ac.at
  • ‡marti.perarnau@icfo.es
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Phys. Rev. E 93, 042135 – Published 26 April, 2016

DOI: https://doi.org/10.1103/PhysRevE.93.042135

Abstract

A fundamental connection between thermodynamics and information theory arises from the fact that correlations exhibit an inherent work value. For noninteracting systems this translates to a work cost for establishing correlations. Here we investigate the relationship between work and correlations in the presence of interactions that cannot be controlled or removed. For such naturally coupled systems, which are correlated even in thermal equilibrium, we determine general strategies that can reduce the work cost of correlations, and illustrate these for a selection of exemplary physical systems.

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Phys. Rev. E 93, 042135– Published 26 April, 2016
  • Received 28 January 2016

©2016 American Physical Society

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