Deviation of Upper Bounds of Critical Temperature of Two-Dimensional O(N) Spin Models |
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| Authors: | Ito K R Tamura H |
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| Institution: | (1) Department of Mathematics and Physics, Setsunan University, Ikeda-Naka, Neyagawa, 572, Japan;(2) Department of Mathematics, Faculty of Science, Kanazawa University, Kanazawa, 920-11, Japan |
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| Abstract: | Critical temperature of the classical O(N) spin model in two dimensions is investigated. We show that no phase transition exists in the system if the inverse temperature  is less than c=c(N), where c(N) is a constant such that c(N) > const. N log N. |
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| Keywords: | spin model determinant polymer (N-1) expansion |
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