A geometric framework for phase synchronization in coupled noisy nonlinear systems

Details A geometric framework for phase synchronization in coupled noisy nonlinear systems A geometric framework for phase synchronization in coupled noisy nonlinear systems

2006-03-08

arxiv.org/abs/nlin/0603015v1

Phys.Rev.E 73, 036206 (2006)

Nonlinear Sciences

Adaptation and Self-Organizing Systems

23 pages

Scientific paper

10.1103/PhysRevE.73.036206

A geometric approach is introduced for understanding the phenomenon of phase synchronization in coupled nonlinear systems in the presence of additive noise. We show that the emergence of cooperative behaviour through a change of stability via a Hopf bifurcation entails the spontaneous appearance of a gauge structure in the system, arising from the evolution of the slow dynamics, but induced by the fast variables. The conditions for the oscillators to be synchronised in phase are obtained. The role of weak noise appears to be to drive the system towards a more synchronized behaviour. Our analysis provides a framework to explain recent experimental observations on noise-induced phase synchronization in coupled nonlinear systems.

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