Phys. Rev. Lett. 84, 404–407 (2000)Enhancement of Stochastic Resonance in Distributed Systems due to a Selective CouplingReceived 24 March 1999; published in the issue dated 17 January 2000 Recent massive numerical simulations have shown that the response of a “stochastic resonator” is enhanced as a consequence of spatial coupling. Similar results have been analytically obtained in a reaction-diffusion model, using nonequilibrium potential techniques. We now consider a field-dependent diffusivity and show that the selectivity of the coupling is more efficient for achieving stochastic-resonance enhancement than its overall value in the constant-diffusivity case. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.404
DOI:
10.1103/PhysRevLett.84.404
PACS:
05.40.Ca, 02.50.Ey, 87.10.+e
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