Stochastic resonance in extended systems: enhancement due to coupling in a reaction-diffusion model
Centro Atómico Bariloche, CNEA Instituto Balseiro, UNC, 8400 S.C. de Bariloche, Argentina
Accepted: 10 March 1997
We study the phenomenon of stochastic resonance in a spatially extended system. The system chosen, a simple version of a reaction-diffusion model, has a known form of the non-equilibrium potential which is exploited to obtain firstly the probability for the decay of the metastable extended states, and then expressions for the correlation function and for the signal-to-noise ratio. We show analytically that this ratio increases with the diffusivity that plays the role of a coupling parameter.
PACS: 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion / 02.50.Ey – Stochastic processes / 87.10.+e – General, theoretical, and mathematical biophysics (including logic of biosystems, quantum biology, and relevant aspects of thermodynamics, information theory, cybernetics, and bionics)
© EDP Sciences, 1997