Mishra, Shradha and Simha, R Aditi and Ramaswamy, Sriram (2010) A dynamic renormalization group study of active nematics. In: Journal of Statistical Mechanics: Theory and Experiment .
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Abstract
We carry out a systematic construction of the coarse-grained dynamical equation of motion for the orientational order parameter for a two-dimensional active nematic, that is a nonequilibrium steady state with uniaxial, apolar orientational order. Using the dynamical renormalization group, we show that the leading nonlinearities in this equation are marginally irrelevant. We discover a special limit of parameters in which the equation of motion for the angle field bears a close relation to the 2d stochastic Burgers equation. We find nevertheless that, unlike for the Burgers problem, the nonlinearity is marginally irrelevant even in this special limit, as a result of a hidden fluctuation-dissipation relation. 2d active nematics therefore have quasi-long-range order, just like their equilibrium counterparts.
Item Type: | Journal Article |
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Publication: | Journal of Statistical Mechanics: Theory and Experiment |
Publisher: | Institute of Physics. |
Additional Information: | Copyright of this article belongs to Institute of Physics. |
Keywords: | granular matter; active membranes; self-propelled particles; passive and active self-assembly |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 29 Mar 2010 10:41 |
Last Modified: | 19 Sep 2010 05:57 |
URI: | http://eprints.iisc.ac.in/id/eprint/26229 |
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