Heat Kernel Upper Bounds on Long Range Percolation Clusters

Details Heat Kernel Upper Bounds on Long Range Percolation Clusters Heat Kernel Upper Bounds on Long Range Percolation Clusters

2009-07-14

arxiv.org/abs/0907.2434v2

Mathematics

Probability

29 pages, Added References, Expanded Theorem 2

Scientific paper

In this paper, we derive upper bounds for the heat kernel of the simple random walk on the infinite cluster of a supercritical long range percolation process. For any $d \geq 1$ and for any exponent $s \in (d, (d+2) \wedge 2d)$ giving the rate of decay of the percolation process, we show that the return probability decays like $t^{-\ffrac{d}{s-d}}$ up to logarithmic corrections, where $t$ denotes the time the walk is run. Moreover, our methods also yield generalized bounds on the spectral gap of the dynamics and on the diameter of the largest component in a box. Besides its intrinsic interest, the main result is needed for a companion paper studying the scaling limit of simple random walk on the infinite cluster.

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