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Diffusion in Fluctuating Media: First Passage Time Problem

Jorge A. Revelli, Carlos. E. Budde and Horacio S. Wio
Physics Letters A 306, 104-109 (2002)

We study the actual and important problem of "Mean First Passage Time" (MFPT) for diffusion in fluctuating media. We exploit van Kampen's technique of "composite stochastic processes", obtaining analytical expressions for the MFPT for a general system, and focus on the two state case where the transitions between the states are modelled introducing both Markovian and non-Markovian processes. The comparison between the analytical and simulations results show an excellent agreement.