Diffusion in Fluctuating Media: The Resonant Activation Problem
摘要
We 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 (), and the total length displacement or number of visited lattice sites (). We observe a double {\it resonant activation}-like phenomenon when we plot the MFPT and as functions of the intensity of the transition rate stochastic component.
引用
@article{arxiv.cond-mat/0307566,
title = {Diffusion in Fluctuating Media: The Resonant Activation Problem},
author = {Jorge A. Revelli and Carlos. E. Budde and Horacio S. Wio},
journal= {arXiv preprint arXiv:cond-mat/0307566},
year = {2007}
}
备注
RevTex, 15 pgs, 8 figures, submitted to Eur.Phys.J.B