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  • Title: Statistical properties of the heat flux between two nonequilibrium steady-state thermostats.
    Author: Lameche M, Naert A.
    Journal: Phys Rev E; 2021 Apr; 103(4-1):042143. PubMed ID: 34005904.
    Abstract:
    We address the question of transport of heat in out-of-equilibrium systems. The experimental setup consists in two coupled granular gas nonequilibrium steady-state (NESS) heat baths, in which Brownian-like rotors are imbedded. These rotors are electromechanically coupled, thanks to DC micromotors, through a resistor R such that energy flows between them. The average flux depends linearly in the difference in the baths' temperature. Varying R allows extrapolation in the nondissipative coupling limit (R→0). We show that in this limit the heat flux obeys the fluctuation theorem in a form proposed by Jarzynski and Wójcik in 2004 [C. Jarzynski and D. K. Wójcik, Phys. Rev. Lett. 92, 230602 (2004)PRLTAO0031-900710.1103/PhysRevLett.92.230602] for the fluctuations of the flux between finite size equilibrium heat baths.
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