Abstract
We prove a conjecture by E. Lieb, which leads to the Lieb inequality for plane rotors. As in the Ising model case, this inequality implies the existence of an algorithm to compute the transition temperature of this model.
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Communicated by E. Lieb
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Rivasseau, V. Lieb's correlation inequality for plane rotors. Commun.Math. Phys. 77, 145–147 (1980). https://doi.org/10.1007/BF01982714
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DOI: https://doi.org/10.1007/BF01982714