Percolation Crossing Formulas and Conformal Field Theory

TL;DR

This paper derives new crossing formulas for 2D percolation using conformal field theory, confirming them with simulations and unifying key crossing probabilities and cluster counts.

Contribution

It introduces novel crossing formulas at the percolation point and provides a unified derivation of important percolation probabilities through conformal field theory.

Findings

New crossing formulas confirmed by high-precision simulations

Unified derivation of Cardy's and Watts' formulas

Operator identities indicating additional symmetry in c=0 CFTs

Abstract

Using conformal field theory, we derive several new crossing formulas at the two-dimensional percolation point. High-precision simulation confirms these results. Integrating them gives a unified derivation of Cardy's formula for the horizontal crossing probability $\Pi_h(r)$, Watts' formula for the horizontal-vertical crossing probability $\Pi_{hv}(r)$, and Cardy's formula for the expected number of clusters crossing horizontally $\mathcal{N}_h(r)$. The main step in our approach implies the identification of the derivative of one primary operator with another. We present operator identities that support this idea and suggest the presence of additional symmetry in $c=0$ conformal field theories.