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  • Title: Nonequilibrium fluctuation-dissipation theorem and heat production.
    Author: Lippiello E, Baiesi M, Sarracino A.
    Journal: Phys Rev Lett; 2014 Apr 11; 112(14):140602. PubMed ID: 24765939.
    Abstract:
    We use a relationship between response and correlation function in nonequilibrium systems to establish a connection between the heat production and the deviations from the equilibrium fluctuation-dissipation theorem. This scheme extends the Harada-Sasa formulation [Phys. Rev. Lett. 95, 130602 (2005)], obtained for Langevin equations in steady states, as it also holds for transient regimes and for discrete jump processes involving small entropic changes. Moreover, a general formulation includes two times and the new concepts of two-time work, kinetic energy, and of a two-time heat exchange that can be related to a nonequilibrium “effective temperature.” Numerical simulations of a chain of anharmonic oscillators and of a model for a molecular motor driven by adenosine triphosphate hydrolysis illustrate these points.
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