Uniform exponential decay below one-half for circle packings

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Let ES,p(s0,r)E_{\mathcal{S},p}(s_0,r) be the event that s0s_0 is connected to distance rr by open disks in site percolation with parameter pp. Uniform exponential decay conjecture. There exists a function f:(0,1/2)→(0,∞)f:(0,1/2)\to(0,\infty) such that, for every 0<p<1/20<p<1/2, every circle packing S\mathcal{S}, and every s0∈Ss_0\in\mathcal{S} with

D:=sup⁡s∈Sdiam⁡(s)<∞,D:=\sup_{s\in\mathcal{S}}\operatorname{diam}(s)<\infty,

for every r>0r>0,

P(ES,p(s0,r))≤exp⁡(−f(p)rD).\mathbb{P}(E_{\mathcal{S},p}(s_0,r))\leq \exp\left(-f(p)\frac{r}{D}\right).

This is conjectured as the subcritical counterpart to the critical one-half conjecture and would provide decay uniform over circle packings with bounded disk diameters. The source does not state a resolution.

References

Primary source

Ron Peled, “On the site percolation threshold of circle packings and planar graphs”, arXiv:2001.10855 (2020).

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