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Distances in $\frac{1}{|x-y|^{2d}}$ percolation models for all dimensions

Probability 2023-10-31 v3 Mathematical Physics math.MP

Abstract

We study independent long-range percolation on Zd\mathbb{Z}^d for all dimensions dd, where the vertices uu and vv are connected with probability 1 for uv=1\|u-v\|_\infty=1 and with probability p(β,{u,v})=1eβu+[0,1)dv+[0,1)d1xy22ddxdyβuv22dp(\beta,\{u,v\})=1-e^{-\beta \int_{u+\left[0,1\right)^d} \int_{v+\left[0,1\right)^d} \frac{1}{\|x-y\|_2^{2d}}d x d y } \approx \frac{\beta}{\|u-v\|_2^{2d}} for uv2\|u-v\|_\infty \geq 2. Let uZdu \in \mathbb{Z}^d be a point with u=n\|u\|_\infty=n. We show that both the graph distance D(0,u)D(\mathbf{0},u) between the origin 0\mathbf{0} and uu and the diameter of the box {0,,n}d\{0 ,\ldots, n\}^d grow like nθ(β)n^{\theta(\beta)}, where 0<θ(β)<10<\theta(\beta ) < 1. We also show that the graph distance and the diameter of boxes have the same asymptotic growth when two vertices u,vu,v with uv2>1\|u-v\|_2 > 1 are connected with a probability that is close enough to p(β,{u,v})p(\beta,\{u,v\}). Furthermore, we determine the asymptotic behavior of θ(β)\theta(\beta) for large β\beta, and we discuss the tail behavior of D(0,u)u2θ(β)\frac{D(\mathbf{0},u)}{\|u\|_2^{\theta(\beta)}}.

Keywords

Cite

@article{arxiv.2208.04800,
  title  = {Distances in $\frac{1}{|x-y|^{2d}}$ percolation models for all dimensions},
  author = {Johannes Bäumler},
  journal= {arXiv preprint arXiv:2208.04800},
  year   = {2023}
}

Comments

70 pages, 9 figures