The Mathematical Institute, University of Oxford, Eprints Archive

Noise-induced synchronization desychronization and clustering in globally coupled nonidentical oscillators

Lai, Y M and Porter, M A (2013) Noise-induced synchronization desychronization and clustering in globally coupled nonidentical oscillators. Physical Review E, 88 (1). 012905.

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Abstract

We study ensembles of globally coupled, nonidentical phase oscillators subject to correlated noise, and we identify several important factors that cause noise and coupling to synchronize or desynchronize a system. By introducing noise in various ways, we find an estimate for the onset of synchrony of a system in terms of the coupling strength, noise strength, and width of the frequency distribution of its natural oscillations. We also demonstrate that noise alone can be sufficient to synchronize nonidentical oscillators. However, this synchrony depends on the first Fourier mode of a phase-sensitivity function, through which we introduce common noise into the system. We show that higher Fourier modes can cause desynchronization due to clustering effects, and that this can reinforce clustering caused by different forms of coupling. Finally, we discuss the effects of noise on an ensemble in which antiferromagnetic coupling causes oscillators to form two clusters in the absence of noise.

Item Type:Article
Subjects:A - C > Biology and other natural sciences
Research Groups:Centre for Mathematical Biology
ID Code:1799
Deposited By: Sara Jolliffe
Deposited On:21 Feb 2014 08:47
Last Modified:29 May 2015 19:29

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