Stochastic thermodynamics of a tagged particle within a harmonic chain

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
D Lacoste, Michael A Lomholt

Abstract

We study the stochastic thermodynamics of an overdamped harmonic chain, which can be viewed equivalently as a one-dimensional Rouse chain or as an approximate model of single file diffusion. We discuss mainly two levels of description of this system: the Markovian level for which the trajectories of all the particles of the chain are known and the non-Markovian level in which only the motion of a tagged particle is available. For each case, we analyze the energy dissipation and its dependence on initial conditions. Surprisingly, we find that the average coarse-grained entropy production rate can become transiently negative when an oscillating force is applied to the tagged particle. This occurs due to memory effects as shown in a framework based on path integrals or on a generalized Langevin equation.

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Citations

Sep 14, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·O BénichouR Voituriez
Jul 22, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Takeshi Ooshida, Michio Otsuki
Sep 4, 2021·Physical Review Letters·David Hartich, Aljaž Godec

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