Abstract
Consider a random set \(V_n \) of points in the box [n, −n)d, generated either by a Poisson process with density p or by a site percolation process with parameter p. We analyze the empirical distribution function F n of the lengths of edges in a minimal (Euclidean) spanning tree \(T_n \) on \(V_n\). We express the limit of F n, as n → ∞, in terms of the free energies of a family of percolation processes derived from \(V_n\) by declaring two points to be adjacent whenever they are closer than a prescribed distance. By exploring the singularities of such free energies, we show that the large-n limits of the moments of F n are infinitely differentiable functions of p except possibly at values belonging to a certain infinite sequence (p c(k): k ≥ 1) of critical percolation probabilities. It is believed that, in two dimensions, these limiting moments are twice differentiable at these singular values, but not thrice differentiable. This analysis provides a rigorous framework for the numerical experimentation of Dussert, Rasigni, Rasigni, Palmari, and Llebaria, who have proposed novel Monte Carlo methods for estimating the numerical values of critical percolation probabilities.
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Bezuidenhout, C., Grimmett, G. & Löffler, A. Percolation and Minimal Spanning Trees. Journal of Statistical Physics 92, 1–34 (1998). https://doi.org/10.1023/A:1023092317419
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DOI: https://doi.org/10.1023/A:1023092317419