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Physical Review Letters 100, 16 (2008) 165705

Athermal dynamics of strongly coupled stochastic three-state oscillators

Bastien Fernandez 1, Lev Tsimring 2

(25/04/2008)

We study the collective behavior of a globally coupled ensemble of cyclic stochastic three-state systems with transition rates from state $i-1$ to state $i$ proportional to the number of systems already in state $i$. While the mean field theory predicts only decaying oscillations in this system, direct numerical simulations indicate that the mean field exhibits stochastic oscillations even in the limit of large number of oscillators. We characterize the regularity of oscillations by the coherence parameter which has a well-defined maximum at the coupling constant of order 1. In contrast, the order parameter characterizing the level of synchrony among oscillators, increases monotonously with the coupling strength. We derive the exact solution of the full master equation for the stationary probability distribution and find the analytical expression for the order parameter.

1 :	Centre de Physique Théorique (CPT)
	CNRS : FR2291 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Université Sud Toulon Var
2 :	BioCircuits Institute
	University of California, San Diego

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Science non linéaire/Adaptation et Systèmes auto-organisés

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Contributeur : Bastien Fernandez <>

Soumis le : Mercredi 19 Mars 2008, 09:14:00

Dernière modification le : Samedi 13 Août 2011, 21:59:59