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Heat fluctuations in a harmonic chain of active particles. | LitMetric

Heat fluctuations in a harmonic chain of active particles.

Phys Rev E

Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.

Published: August 2021

AI Article Synopsis

Article Abstract

One of the major challenges in stochastic thermodynamics is to compute the distributions of stochastic observables for small-scale systems for which fluctuations play a significant role. Hitherto much theoretical and experimental research has focused on systems composed of passive Brownian particles. In this paper, we study the heat fluctuations in a system of interacting active particles. Specifically we consider a one-dimensional harmonic chain of N active Ornstein-Uhlenbeck particles, with the chain ends connected to heat baths of different temperatures. We compute the moment-generating function for the heat flow in the steady state. We employ our general framework to explicitly compute the moment-generating function for two example single-particle systems. Further, we analytically obtain the scaled cumulants for the heat flow for the chain. Numerical Langevin simulations confirm the long-time analytical expressions for first and second cumulants for the heat flow for a two-particle chain.

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http://dx.doi.org/10.1103/PhysRevE.104.024605DOI Listing

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