Minimal model for active nematics: quasi-long-range order and giant fluctuations

Details Minimal model for active nematics: quasi-long-range order and giant fluctuations Minimal model for active nematics: quasi-long-range order and giant fluctuations

2006-03-03

arxiv.org/abs/cond-mat/0603080v1

Rev Lett 96, 180602 (2006).

Physics

Condensed Matter

Statistical Mechanics

Submitted to Phys. Rev. Lett. 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.180602

We propose a minimal 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 non-equilibrium context, the ordered phase is characterized by giant density fluctuations, in agreement with the predictions of Ramaswamy {\it et al.} [Europhys. Lett. {\bf 62}, 196 (2003)].

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