Partition function of the eight-vertex lattice model (Reprinted from Annals of Physics, vol 70, pg 193-228, 1972)

摘要

The partition function of the zero-field "Eight-Vertex" model on a square nd by iv lattice is calculated exactly in the limit of M, N large. This model includes the dimer, ice and zero-field Ising. F and KDP models as special causes. In general the Free energy has a branch point singularity at a phase transition, with an irrational exponent. (C) 1972 Academic Press. [References: 12]