Phase resetting of collective rhythm in ensembles of oscillators

Details Phase resetting of collective rhythm in ensembles of oscillators Phase resetting of collective rhythm in ensembles of oscillators

2010-07-23

arxiv.org/abs/1007.4097v2

Phys. Rev. E 82, 056202 (2010)

Physics

Condensed Matter

Statistical Mechanics

submitted to Phys. Rev. E

Scientific paper

Phase resetting curves characterize the way a system with a collective periodic behavior responds to perturbations. We consider globally coupled ensembles of Sakaguchi-Kuramoto oscillators, and use the Ott-Antonsen theory of ensemble evolution to derive the analytical phase resetting equations. We show the final phase reset value to be composed of two parts: an immediate phase reset directly caused by the perturbation, and the dynamical phase reset resulting from the relaxation of the perturbed system back to its dynamical equilibrium. Analytical, semi-analytical and numerical approximations of the final phase resetting curve are constructed. We support our findings with extensive numerical evidence involving identical and non-identical oscillators. The validity of our theory is discussed in the context of large ensembles approximating the thermodynamic limit.

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