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Stochastic resonance in an extended FitzHugh-Nagumo system: The role of selected coupling

Claudio J. Tessone; Horacio S. Wio
Physica A 374, 46-54 (2007)

Here we present a study of stochastic resonance (SR) in an extended FitzHugh Nagumo system with a field dependent activator diffusion. We show that the system response (here measured through the output signal-to-noise ratio (SNR)) is enhanced due to the particular form of the non-homogeneous coupling. Such a result supports previous ones obtained in a simpler scalar reaction-diffusion system and shows that such an enhancement, induced by the field dependent diffusion -or selective coupling-, is a robust phenomenon.