English

Behavior of the distance exponent for $\frac{1}{|x-y|^{2d}}$ long-range percolation

Probability 2025-10-27 v3

Abstract

We study independent long-range percolation on Zd\mathbb{Z}^d where the vertices uu and vv are connected with probability asymptotic to βuv2d\frac{\beta}{\|u-v\|^{2d}} for uv2\|u-v\|_\infty\geq 2 and with probability 1 for uv=1\|u-v\|_\infty=1, where β0\beta \geq 0 is a parameter. It is proven in [5] that there exists an exponent θ=θ(d,β)(0,1]\theta=\theta(d,\beta) \in \left(0,1\right] such that the graph distance between the origin 0\mathbf{0} and xZdx \in \mathbb{Z}^d scales like xθ\|x\|^{\theta}. We prove that this exponent θ(d,β)\theta(d,\beta) is continuous and strictly decreasing as a function in β\beta. Furthermore, we show that θ(d,β)=1β+o(β)\theta(d,\beta)=1-\beta+o(\beta) for small β\beta in dimension d=1d=1.

Keywords

Cite

@article{arxiv.2208.04793,
  title  = {Behavior of the distance exponent for $\frac{1}{|x-y|^{2d}}$ long-range percolation},
  author = {Johannes Bäumler},
  journal= {arXiv preprint arXiv:2208.04793},
  year   = {2025}
}

Comments

67 pages. Accepted in Electronic Journal of Probability