Corner contribution to percolation cluster numbers

2012/10/31 by István A. Kovács, Ferenc Iglói, John Cardy · 1 citation
Physics and Astronomy · #cond-mat.stat-mech #cond-mat.dis-nn

paper · pdf · doi:10.1103/physrevb.86.214203

published as Phys. Rev. B 86, 214203 (2012) · 7 pages, 9 figures

arxiv created 2012/12/17 · arxiv updated 2012/12/18

Abstract

We study the number of clusters in two-dimensional (2d) critical percolation, N_Gamma, which intersect a given subset of bonds, Gamma. In the simplest case, when Gamma is a simple closed curve, N_Gamma is related to the entanglement entropy of the critical diluted quantum Ising model, in which Gamma represents the boundary between the subsystem and the environment. Due to corners in Gamma there are universal logarithmic corrections to N_Gamma, which are calculated in the continuum limit through conformal invariance, making use of the Cardy-Peschel formula. The exact formulas are confirmed by large scale Monte Carlo simulations. These results are extended to anisotropic percolation where they confirm a result of discrete holomorphicity.

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