# Renormalization group for link percolation on planar hyperbolic manifolds

## TL;DR

This paper explores how the geometry of planar hyperbolic manifolds influences the nature of link percolation transitions, revealing different universality classes and transition types depending on polygon size distributions.

## Contribution

It extends the understanding of percolation on hyperbolic manifolds by analyzing a broader class of models and identifying how size distribution affects transition universality and type.

## Key findings

- Percolation transition type depends on polygon size distribution.
- Hybrid transitions occur for power-law exponents between 3 and 4.
- Continuous transitions are observed for exponents between 2 and 3.

## Abstract

Network geometry is currently a topic of growing scientific interest as it opens the possibility to explore and interpret the interplay between structure and dynamics of complex networks using geometrical arguments. However the field is still in its infancy. In this work we investigate the role of network geometry in determining the nature of the percolation transition in planar hyperbolic manifolds. In Ref. [1], S. Boettcher, V. Singh, R. M. Ziff have shown that a special type of two-dimensional hyperbolic manifolds, the Farey graphs, display a discontinuous transition for ordinary link percolation. Here using the renormalization group we investigate the critical properties of link percolation on a wider class of two-dimensional hyperbolic deterministic and random manifolds constituting the skeletons of two-dimensional cell complexes. These hyperbolic manifolds are built iteratively by subsequently gluing $m$-polygons to single edges. We show that when the size $m$ of the polygons is drawn from a distribution $q_m$ with asymptotic power-law scaling $q_m\simeq Cm^{-\gamma}$ for $m\gg1$, different universality classes can be observed for different values of the power-law exponent $\gamma$. Interestingly the percolation transition is hybrid for $\gamma\in (3,4)$ and becomes continuous for $\gamma \in (2,3]$