Abstract
A method is developed for making exact evaluations of correlation functions of odd numbers of spins on the Onsager-Ising lattice, applicable to cases in which the separations between the spins are finite. The method is based on an identity which permits the reduction of determinants of infinite-dimensional matrices to those of finite dimension. Particularly simple results are obtained when all spins are on a straight line. Numerical calculations are carried out for a few cases.
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Chubb, S.R., Fox, D. Correlation functions of odd numbers of spins with finite separations on the Onsager-Ising lattice. J Stat Phys 23, 627–638 (1980). https://doi.org/10.1007/BF01011733
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DOI: https://doi.org/10.1007/BF01011733