New universality class in percolation on multifractal scale-free planar stochastic lattice

TL;DR

This paper studies site percolation on a multifractal, scale-free planar lattice, revealing a new universality class with unique critical exponents and an exact percolation threshold.

Contribution

It provides the first exact determination of percolation threshold and critical exponents for WPSL, establishing a new universality class in planar percolation.

Findings

Percolation threshold $p_c$ is exactly determined.

Critical exponents differ from known planar lattice universality classes.

WPSL percolation exhibits unique critical behavior.

Abstract

We investigate site percolation on a weighted planar stochastic lattice (WPSL) which is a multifractal and whose dual is a scale-free network. Percolation is typically characterized by percolation threshold $p_c$ and by a set of critical exponents $\beta$, $\gamma$, $\nu$ which describe the critical behavior of percolation probability $P(p)\sim (p_c-p)^\beta$, mean cluster size $S\sim (p_c-p)^{-\gamma}$ and the correlation length $\xi\sim (p_c-p)^{-\nu}$. Besides, the exponent $\tau$ characterizes the cluster size distribution function $n_s(p_c)\sim s^{-\tau}$ and the fractal dimension $d_f$ the spanning cluster. We obtain an exact value for $p_c$ and for all these exponents. Our results suggest that the percolation on WPSL belong to a new universality class as its exponents do not share the same value as for all the existing planar lattices.