Journal article

A VARIATIONAL APPROXIMATION FOR CUBIC LATTICE MODELS IN STATISTICAL-MECHANICS

RJ BAXTER, PJ FORRESTER

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | IOP PUBLISHING LTD | Published : 1984

Abstract

A variational approximation applicable to three-dimensional isotropic cubic lattice models is formulated. When applied to the simple cubic, face centred cubic and body centred cubic Ising models, the approximation correctly gives the first 14, 19, and 23 terms respectively of the known low-temperature free energy expansion.

University of Melbourne Researchers