Site percolation and random walks on d-dimensional Kagome lattices
Abstract
The site percolation problem is studied on d-dimensional generalisations of the Kagome' lattice. These lattices are isotropic and have the same coordination number q as the hyper-cubic lattices in d dimensions, namely q=2d. The site percolation thresholds are calculated numerically for d= 3, 4, 5, and 6. The scaling of these thresholds as a function of dimension d, or alternatively q, is different than for hypercubic lattices: p_c ~ 2/q instead of p_c ~ 1/(q-1). The latter is the Bethe approximation, which is usually assumed to hold for all lattices in high dimensions. A series expansion is calculated, in order to understand the different behaviour of the Kagome' lattice. The return probability of a random walker on these lattices is also shown to scale as 2/q. For bond percolation on d-dimensional diamond lattices these results imply p_c ~ 1/(q-1).
Cite
@article{arxiv.cond-mat/9801112,
title = {Site percolation and random walks on d-dimensional Kagome lattices},
author = {Steven C. van der Marck},
journal= {arXiv preprint arXiv:cond-mat/9801112},
year = {2009}
}
Comments
11 pages, LaTeX, 8 figures (EPS format), submitted to J. Phys. A