Persistence effects in deterministic diffusion

Details Persistence effects in deterministic diffusion Persistence effects in deterministic diffusion

2009-08-05

arxiv.org/abs/0908.0600v1

Nonlinear Sciences

Chaotic Dynamics

7 pages, 7 figures

Scientific paper

In systems which exhibit deterministic diffusion, the gross parameter dependence of the diffusion coefficient can often be understood in terms of random walk models. Provided the decay of correlations is fast enough, one can ignore memory effects and approximate the diffusion coefficient according to dimensional arguments. By successively including the effects of one and two steps of memory on this approximation, we examine the effects of ``persistence'' on the diffusion coefficients of extended two-dimensional billiard tables and show how to properly account for these effects, using walks in which a particle undergoes jumps in different directions with probabilities that depend on where they came from.

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