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Gaussian bounds and Collisions of variable speed random walks on lattices with power law conductances
Xinxing Chen · 2015-07-19 · via math.PR updates on arXiv.org

We consider a weighted lattice $Z^d$ with conductance $μ_e=|e|^{-α}$. We show that the heat kernel of a variable speed random walk on it satisfies a two-sided Gaussian bound by using an intrinsic metric. We also show that when $d=2$ and $α\in (-1,0)$, two independent random walks on such weighted lattice will collide infinite many times while they are transient.

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