Crossing velocities for an annealed random walk in a random potential

Details Crossing velocities for an annealed random walk in a random potential Crossing velocities for an annealed random walk in a random potential

2011-03-02

arxiv.org/abs/1103.0515v2

Stochastic Processes and their Applications, Volume 122, Issue 1, January 2012, Pages 277-304

Mathematics

Probability

29 pages

Scientific paper

10.1016/j.spa.2011.08.008

We consider a random walk in an i.i.d. non-negative potential on the d-dimensional integer lattice. The walk starts at the origin and is conditioned to hit a remote location y on the lattice. We prove that the expected time under the annealed path measure needed by the random walk to reach y grows only linearly in the distance from y to the origin. In dimension one we show the existence of the asymptotic positive speed.

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