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Origins and diagnostics of the nonequilibrium character of active systems

Dadhichi, Lokrshi Prawar and Maitra, Ananyo and Ramaswamy, Sriram (2018) Origins and diagnostics of the nonequilibrium character of active systems. In: JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT .

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Official URL: https://doi.org/ 10.1088/1742-5468/aae852

Abstract

We present in detail a Langevin formalism for constructing stochastic dynamical equations for active-matter systems coupled to a thermal bath. We apply the formalism to clarify issues of principle regarding the sources and signatures of nonequilibrium behaviour in a variety of polar and apolar single-particle systems and polar flocks. We show that distance from thermal equilibrium depends on how time-reversal is implemented and hence on the reference equilibrium state. We predict characteristic forms for the frequency-resolved entropy production for an active polar particle in a harmonic potential, which should be testable in experiments.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to IOP PUBLISHING LTD
Keywords: active matter; fluctuating hydrodynamics
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Francis Jayakanth
Date Deposited: 08 Feb 2019 09:26
Last Modified: 13 Mar 2019 05:09
URI: http://eprints.iisc.ac.in/id/eprint/61380

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