Enhanced Orientational Ordering Induced by an Active yet Isotropic Bath.

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ID: 95634
2020
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Abstract
Can a bath of isotropic but active particles promote ordering of anisotropic but passive particles? In this Letter, we uncover a fluctuation-driven mechanism by which this is possible. Somewhat counterintuitively, we show that the passive particles tend to be more ordered upon increasing the noise strength of the active isotropic bath. We first demonstrate this in a general dynamical model for a nonconserved order parameter (model A) coupled to an active isotropic field and then concentrate on two examples: (i) a collection of polar rods on a substrate in an active isotropic bath and (ii) a passive apolar suspension in a momentum conserved, actively forced but isotropic fluid, which are relevant for current research in active systems. Our theory, which is relevant for understanding ordering transitions in out-of-equilibrium systems can be tested in experiments, for instance, by introducing a low concentration of passive rodlike objects in active isotropic fluids and, since it is applicable to any nonconserved dynamical field, may have applications far beyond active matter.
Reference Key
maitra2020enhancedphysical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Maitra, Ananyo;Voituriez, Raphael;
Journal physical review letters
Year 2020
DOI
10.1103/PhysRevLett.124.048003
URL
Keywords
corrigendum

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