Onset of collective and cohesive motion

Preprint

13 January 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0401208

Abstract

We study the onset of collective motion, with and without cohesion, of groups of noisy self-propelled particles interacting locally. We find that this phase transition, in two space dimensions, is always discontinuous, including for the minimal model of Vicsek et al. [Phys. Rev. Lett. {\bf 75},1226 (1995)] for which a non-trivial critical point was previously advocated. We also show that cohesion is always lost near onset, as a result of the interplay of density, velocity, and shape fluctuations.

Keywords

ONSET OF COLLECTIVE
COLLECTIVE MOTION
PHASE TRANSITION
COHESIVE MOTION
MOTION WE STUDY
CRITICAL POINT
PROPELLED
COHESION

All Related Versions

Version 1, 2004-01-13, ArXiv
Published version: Physical Review Letters, 92 (2), 025702.

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