Convergent expansions for asymptotically degenerate inverse correlation lengths of classical lattice spin systems
Authors:
Michael O'Carroll
Affiliation:
(1) Departamento de Fisica-ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
Abstract:
We obtain convergent expansions for the inverse correlation length associated with various spin-spin correlation functions for some weakly coupled multicomponent classical lattice spin systems. In terms of the lattice quantum field theory associated with the models the expansions provide a convergent perturbation theory for particle masses which are asymptotically degenerate in the limit of zero coupling.Reseach partially supported by CNPq, Brazil.