Two-dimensional Site-Bond Percolation as an Example of Self-Averaging System

Details Two-dimensional Site-Bond Percolation as an Example of Self-Averaging System Two-dimensional Site-Bond Percolation as an Example of Self-Averaging System

2002-04-17

arxiv.org/abs/cond-mat/0204383v1

JETP Letters, 75 162-166 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

15 pages, 5 figures

Scientific paper

10.1134/1.1469506

The Harris-Aharony criterion for a statistical model predicts, that if a specific heat exponent $\alpha \ge 0$, then this model does not exhibit self-averaging. In two-dimensional percolation model the index $\alpha=-{1/2}$. It means that, in accordance with the Harris-Aharony criterion, the model can exhibit self-averaging properties. We study numerically the relative variances $R_{M}$ and $R_{\chi}$ for the probability $M$ of a site belongin to the "infinite" (maximum) cluster and the mean finite cluster size $\chi$. It was shown, that two-dimensional site-bound percolation on the square lattice, where the bonds play the role of impurity and the sites play the role of the statistical ensemble, over which the averaging is performed, exhibits self-averaging properties.

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