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, 2018 (12).
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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 |
|---|---|
| Publication: | JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT |
| Publisher: | IOP PUBLISHING LTD |
| Additional Information: | The Copyright of this article belongs to IOP PUBLISHING LTD. |
| Keywords: | active matter;fluctuating hydrodynamics |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 02 Jan 2019 17:02 |
| Last Modified: | 27 Jun 2022 10:30 |
| URI: | https://eprints.iisc.ac.in/id/eprint/61287 |
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