An estimate for the radial chemical distance in 2d critical percolation clusters

Philippe Sosoe and Lily Reeves

Stochastic Processes and their Applications, 2022, vol. 147, issue C, 145-174

Abstract: We derive an estimate for the distance, measured in lattice spacings, inside two-dimensional critical percolation clusters from the origin to the boundary of the box of side length 2n, conditioned on the existence of an open connection. The estimate we obtain is the radial analogue of the one found in the work of Damron, Hanson, and Sosoe. In the present case, however, there is no lowest crossing in the box to compare to, so we construct a path γ from the origin to distance n that consists of “three-arm” points, and whose volume can thus be estimated by O(n2π3(n)). Here, π3(n) is the “three-arm probability” that the origin is connected to distance n by three arms, two open and one dual-closed. We then develop estimates for the existence of shortcuts around an edge e in the box, conditional on {e∈γ}, to obtain a bound of the form O(n2−δπ3(n)) for some δ>0.

Date: 2022
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DOI: 10.1016/j.spa.2022.01.018

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