Volume 61, Number 2, January 2003
|Page(s)||162 - 167|
|Published online||01 January 2003|
System size coherence resonance in coupled FitzHugh-Nagumo models
Departament de Física, Universitat de les Illes Balears E-07071 Palma de Mallorca, Spain
2 Instituto Mediterráneo de Estudios Avanzados (IMEDEA), CSIC-UIB E-07071 Palma de Mallorca, Spain
3 Department of Physics, Lehigh University - Bethlehem, PA 18015, USA (Permanent address.)
Accepted: 4 November 2002
We show the existence of a system size coherence resonance effect for coupled excitable systems. Namely, we demonstrate numerically that the regularity in the signal emitted by an ensemble of globally coupled FitzHugh-Nagumo systems, under excitation by independent noise sources, is optimal for a particular value of the number of coupled systems. This resonance is shown through several different dynamical measures: the time correlation function, correlation time and jitter.
PACS: 05.40.Ca – Noise / 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems / 05.45.Xt – Synchronization; coupled oscillators
© EDP Sciences, 2003
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