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Teoreticheskaya i Matematicheskaya Fizika, 1990, Volume 83, Number 3, Pages 455–461
(Mi tmf5826)
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Gaussian approximation in the Ising model with long-range interaction
M. A. Popov
Abstract:
The infinite hierarchy of equations for the cumulants of the correlation functions of the longitudinal spin components in the Ising model with long-range interaction corresponding to a Gaussian form of the spectral density is investigated. The invariance of the cumulants with respect to permutation of the vertices is used to decouple the hierarchy. A phase transition of the second kind is described by the obtained system of equations for the cumulants of the first three orders in a three-dimensional model.
Received: 21.07.1989
Citation:
M. A. Popov, “Gaussian approximation in the Ising model with long-range interaction”, TMF, 83:3 (1990), 455–461; Theoret. and Math. Phys., 83:3 (1990), 658–663
Linking options:
https://www.mathnet.ru/eng/tmf5826 https://www.mathnet.ru/eng/tmf/v83/i3/p455
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