English

Speed of random walk on dynamical percolation in nonamenable transitive graphs

Probability 2024-07-23 v1

Abstract

Let GG be a nonamenable transitive unimodular graph. In dynamical percolation, every edge in GG refreshes its status at rate μ>0\mu>0, and following the refresh, each edge is open independently with probability pp. The random walk traverses GG only along open edges, moving at rate 11. In the critical regime p=pcp=p_c, we prove that the speed of the random walk is at most O(μlog(1/μ))O(\sqrt{\mu \log(1/\mu)}), provided that μe1\mu \le e^{-1}. In the supercritical regime p>pcp>p_c, we prove that the speed on GG is of order 1 (uniformly in μ)\mu), while in the subcritical regime p<pcp<p_c, the speed is of order μ1\mu\wedge 1.

Keywords

Cite

@article{arxiv.2407.15079,
  title  = {Speed of random walk on dynamical percolation in nonamenable transitive graphs},
  author = {Chenlin Gu and Jianping Jiang and Yuval Peres and Zhan Shi and Hao Wu and Fan Yang},
  journal= {arXiv preprint arXiv:2407.15079},
  year   = {2024}
}

Comments

29 pages, 1 figure