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Diffusion in Fluctuating Media: Resonant Activation

Otros títulosDiffusion in Fluctuating Media: The Resonant Activation Problem
Autor Revelli, Jorge A.; Budde, Carlos E.; Wio, Horacio S.
Palabras clave Resonant Activation
Mean First Passage Time
Fluctuating media
Fecha de publicación 11-may-2004
Citación Physica A 342(1-2): 1-8 (2004)
ResumenWe present a one-dimensional model for diffusion in a fluctuating lattice; that is a lattice which can be in two or more states. Transitions between the lattice states are induced by a combination of two processes: one periodic deterministic and the other stochastic. We study the dynamics of a system of particles moving in that medium, and characterize the problem from different points of view: mean first passage time (MFPT), probability of return to a given site (P_{s_0}), and the total length displacement or number of visited lattice sites (Λ). We observe a double resonant activation-like phenomenon when we plot the MFPT and P_{s_0} as functions of the intensity of the transition rate stochastic component.
Descripción 8 pages, 4 figures.-- PACS nrs.: 46.65.+g, 05.40.FW., 05.10.Ln., 02.50.Eg.-- ArXiv pre-print available: http://arxiv.org/abs/cond-mat/0307566 [title: "Diffusion in Fluctuating Media: The Resonant Activation Problem"].
Paper included in "Proceedings of the VIII Latin American Workshop on Nonlinear Phenomena" (Salvador, Bahia, Brazil, 28 September-03 October 2003, edited by R.F.S. Andrade, S.R.T. Pinho and S.R.A. Salinas).
Versión del editorhttp://dx.doi.org/10.1016/j.physa.2004.04.052
URI http://hdl.handle.net/10261/7488
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