Exact results for the zeros of the partition function of the Potts model on finite lattices

Seung-Yeon Kim and Richard J Creswick

Physica A: Statistical Mechanics and its Applications, 2000, vol. 281, issue 1, 252-261

Abstract: The Yang–Lee zeros of the Q-state Potts model are investigated in one, two and three dimensions. Analytical results derived from the transfer matrix for the one-dimensional model reveal a systematic behavior of the locus of zeros as a function of Q. For 12 they lie outside the unit circle for finite temperature. In the special case Q=2 the zeros lie exactly on the unit circle as proved by Lee and Yang. In two and three dimensions the zeros are calculated numerically and behave in the same way. Results are also presented for the critical line of the Potts model in an external field as determined from the zeros of the partition function in the complex temperature plane.

Keywords: Phase transition; Potts model; Yang–Lee zeros; Partition function (search for similar items in EconPapers)
Date: 2000
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:281:y:2000:i:1:p:252-261

DOI: 10.1016/S0378-4371(00)00022-4

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