Abstract
The density of the Fisher zeroes, or zeroes of the partition function in the complex temperature plane, is determined for the Ising model in zero field as well as in a pure imaginary field iπ/2. Results are given for the simple-quartic, triangular, honeycomb, and the kagomé lattices. It is found that the density diverges logarithmically at points along its loci in appropriate variables.
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Lu, W.T., Wu, F.Y. Density of the Fisher Zeroes for the Ising Model. Journal of Statistical Physics 102, 953–970 (2001). https://doi.org/10.1023/A:1004863322373
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DOI: https://doi.org/10.1023/A:1004863322373