Simple Model for Active Nematics: Quasi-Long-Range Order and Giant Fluctuations
- 9 May 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 96 (18) , 180602
- https://doi.org/10.1103/physrevlett.96.180602
Abstract
We propose a simple microscopic model for active nematic particles similar in spirit to the Vicsek model for self-propelled polar particles. In two dimensions, we show that this model exhibits a Kosterlitz-Thouless-like transition to quasi-long-range orientational order and that in this nonequilibrium context, the ordered phase is characterized by giant density fluctuations, in agreement with the predictions of Ramaswamy et al. [ Europhys. Lett. 62, 196 (2003)].Keywords
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