Perturbation calculation for the eight-vertex model around the Ising point for T → Tc−

Lee-Fen Ko

Lee-Fen Ko

Claus Vohwinkel, Peter Weisz B

A. Toschi

Lee-Fen Ko

The dispersion expansions for the two-point electric correlation functions in the eight-vertex model are calculated to first order in the four-spin coupling in the scaling limit. This is a systematic study of perturbation around the Ising system in the massive regime; features having general relevance are emphasized.

M. Aydin, M. Cemal Yalabık

The dynamical critical exponent z is obtained through a Monte Carlo renormalisation group calculation for the eight-vertex model with non-conserved dynamics. The value of z at several points along the critical line is evaluated. No appreciable variation in z relative to the Ising value is observed within the accuracy of the work.