Stochastic continuum theory of active nematics

ORAL

Abstract

We derive a stochastic continuum theory of active nematics by direct coarse-graining of a generic microscopic model and study it numerically. This allows to clarify the microscopic origin of the various terms found and to determine the non-trivial structure of the noises. We show in particular that two terms coupling density and order the non-equilibrium active current argued before to be at the origin of giant density fluctuations, and a multiplicative conserved noise are necessary to obtain a faithful description of the original model.

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Authors

  • Shradha Mishra

    • Syracuse University

  • Francesco Ginelli

    • CEA – Service de Physique de l' Etat Condens\'e, CEN Saclay, 91191 Gif-sur-Yvette, France

  • Hugues Chate

    • CEA – Service de Physique de l' Etat Condens\'e, CEN Saclay, 91191 Gif-sur-Yvette, France

  • Sanjay Puri

    • School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India

  • Sriram Ramaswamy

    • Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore, India