Thin Fisher Zeroes

Abstract

Biskup et al. [Phys. Rev. Lett. 84 (2000) 4794] have recently suggested that the loci of partition function zeroes can profitably be regarded as phase boundaries in the complex temperature or field planes. We obtain the Fisher zeroes for Ising and Potts models on non-planar (``thin'') regular random graphs using this approach, and note that the locus of Fisher zeroes on a Bethe lattice is identical to the corresponding random graph. Since the number of states appears as a parameter in the Potts solution the limiting locus of chromatic zeroes is also accessible.

10 pages, 4 figures

References in corpus (2)

• Exact Potts Model Partition Functions on Wider Arbitrary-Length Strips of the Square Lattice
• Directed Percolation and the Golden Ratio

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• Fat and Thin Fisher Zeroes
• Chromatic Zeros on the Limit $G_{\infty }^{(p,\ell )}$ of the Family $G_m^{(p,\ell )}$ of Hierarchical Graphs