Random walk in random environment with asymptotically zero perturbation

Details Random walk in random environment with asymptotically zero perturbation Random walk in random environment with asymptotically zero perturbation

2006-08-28

arxiv.org/abs/math/0608696v1

Journal of the European Mathematical Society, Vol. 8 (2006), no. 3, p. 491-513

Mathematics

Probability

Scientific paper

10.4171/JEMS/64

We give criteria for ergodicity, transience and null recurrence for the random walk in random environment on {0,1,2,...}, with reflection at the origin, where the random environment is subject to a vanishing perturbation. Our results complement existing criteria for random walks in random environments and for Markov chains with asymptotically zero drift, and are significantly different to these previously studied cases. Our method is based on a martingale technique - the method of Lyapunov functions.

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