Stochastic Resonance in an Extended FitzHugh-Nagumo System: the Role of Selective Coupling

TL;DR

This paper investigates how field-dependent, selective coupling in an extended FitzHugh-Nagumo system enhances stochastic resonance, demonstrating the robustness of this phenomenon across different reaction-diffusion models.

Contribution

It introduces a novel analysis of stochastic resonance with field-dependent diffusion in an extended FitzHugh-Nagumo system, confirming the robustness of enhancement effects.

Findings

System response is enhanced by non-homogeneous coupling.

Field-dependent diffusion induces robust stochastic resonance.

Results support previous findings in simpler models.

Abstract

Here we present a study of stochastic resonance 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) 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.