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Partition function zeros of the Q-state Potts model for non-integer Q | Seung-Yeon Kim
; Richard J. Creswick
; Chi-Ning Chen
; Chin-Kun Hu
; | Date: |
28 Sep 1999 | Journal: | Physica A 281 (2000) 262 | Subject: | Statistical Mechanics | cond-mat.stat-mech | Affiliation: | University of South Carolina at Columbia), Chi-Ning Chen, Chin-Kun Hu (Academia Sinica, Taiwan | Abstract: | The distribution of the zeros of the partition function in the complex temperature plane (Fisher zeros) of the two-dimensional Q-state Potts model is studied for non-integer Q. On $L imes L$ self-dual lattices studied ($Lle8$), no Fisher zero lies on the unit circle $p_0=e^{i heta}$ in the complex $p=(e^{eta J}-1)/sqrt{Q}$ plane for Q<1, while some of the Fisher zeros lie on the unit circle for Q>1 and the number of such zeros increases with increasing Q. The ferromagnetic and antiferromagnetic properties of the Potts model are investigated using the distribution of the Fisher zeros. For the Potts ferromagnet we verify the den Nijs formula for the thermal exponent $y_t$. For the Potts antiferromagnet we also verify the Baxter conjecture for the critical temperature and present new results for the thermal exponents in the range 0 | Source: | arXiv, cond-mat/9909391 | Services: | Forum | Review | PDF | Favorites |
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