Noise, Bifurcations, and Modeling of Interacting Particle Systems

Details Noise, Bifurcations, and Modeling of Interacting Particle Systems Noise, Bifurcations, and Modeling of Interacting Particle Systems

2012-04-20

arxiv.org/abs/1204.4597v1

Nonlinear Sciences

Adaptation and Self-Organizing Systems

Scientific paper

We consider the stochastic patterns of a system of communicating, or coupled, self-propelled particles in the presence of noise and communication time delay. For sufficiently large environmental noise, there exists a transition between a translating state and a rotating state with stationary center of mass. Time delayed communication creates a bifurcation pattern dependent on the coupling amplitude between particles. Using a mean field model in the large number limit, we show how the complete bifurcation unfolds in the presence of communication delay and coupling amplitude. Relative to the center of mass, the patterns can then be described as transitions between translation, rotation about a stationary point, or a rotating swarm, where the center of mass undergoes a Hopf bifurcation from steady state to a limit cycle. Examples of some of the stochastic patterns will be given for large numbers of particles.

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