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Phys. Rev. Lett. 84, 404 - 407 (2000)

Enhancement of Stochastic Resonance in Distributed Systems due to a Selective Coupling

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B. von Haeften1, R. Deza1 *, and H. S. Wio2 †,‡
1Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Deán Funes 3350, 7600 Mar del Plata, Argentina
2Grupo de Física Estadística, Centro Atómico Bariloche (CNEA) and Instituto Balseiro (CNEA and UNC), 8400 San Carlos de Bariloche, Argentina

Received 24 March 1999

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

* Electronic address: deza@mdp.edu.ar
† Electronic address: wio@cab.cnea.gov.ar
‡ http://www.cab.cnea.gov.ar/Cab/invbasica/FisEstad/estadis.htm

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