Bounds of percolation thresholds on hyperbolic lattices

Abstract

We analytically study bond percolation on hyperbolic lattices obtained by tiling a hyperbolic plane with constant negative Gaussian curvature. The quantity of our main concern is $p_{c2}$, the value of occupation probability where a unique unbounded cluster begins to emerge. By applying the substitution method to known bounds of the order-5 pentagonal tiling, we show that $p_{c2}\ge 0.382508$ for the order-5 square tiling, $p_{c2}\ge 0.472043$ for its dual, and $p_{c2}\ge 0.275768$ for the order-5-4 rhombille tiling.

12 pages, 9 figures

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