A central limit theorem for random walk in random environment on marked Galton-Watson trees

Details A central limit theorem for random walk in random environment on marked Galton-Watson trees A central limit theorem for random walk in random environment on marked Galton-Watson trees

2008-12-10

arxiv.org/abs/0812.1948v6

Electronic Journal of Probability, vol 16, 2011, 174-215

Mathematics

Probability

Scientific paper

In this article we focus on a general model of random walk on random marked trees. We prove a recurrence criterion, analogue to the recurrence criterion proved by R. Lyons and Robin Pemantle (1992) in a slightly different model. In the critical case, we obtain a criterion for the positive/null recurrence. Several regimes appear, as proved (in a similar model), by Y. Hu and Z. Shi (2007). We focus on the "diffusive" regime and improve their result in this case, by obtaining a functional Central Limit Theorem. Our result is also an extension of a result by Y. Peres and O. Zeitouni (2008), obtained in the setting of biased random walk in Galton-Watson trees.

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