Collision probability for random trajectories in two dimensions

Details Collision probability for random trajectories in two dimensions Collision probability for random trajectories in two dimensions

2007-03-22

arxiv.org/abs/math/0703671v1

Mathematics

Probability

37 pages

Scientific paper

We give a lower bound for the non-collision probability up to a long time T in a system of n independent random walks with fixed obstacles on the two-dimensional lattice. By `collision' we mean collision between the random walks as well as collision with the fixed obstacles. We give an analogous result for Brownian particles on the plane. We also explain how this result can be used to describe in terms of "quasi random walks" a diluted gas evolving under Kawasaki dynamics or simple exclusion.

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