Simple model for active nematics: Quasi-long-range order and giant fluctuations

Hugues Chate, Francesco Ginelli, Raul Montagne

Research output: Contribution to journalArticlepeer-review

207 Citations (Scopus)


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.

Original languageEnglish
Article number180602
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 12 May 2006


  • self-propelled particles
  • number fluctuations
  • ameboid cells
  • flocks
  • hydrodynamics
  • dimensions
  • transitions
  • systems
  • absence
  • waves


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