A relationship between the two-point correlation function of the Ising model in the critical region and the 〈sin√πφ(0)sin√πφ(ρ)〉 Green's function of a sine-Gordon field is constructed. This relationship is tested by means of a mass perturbation expansion with an infrared cutoff and shown to agree, at the leading-logarithm approximation and up to the second order, with the exact result of the Ising model.
No takes yet. Share an insight, caveat, or question.
Zuber et al. (1977) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: