Lattice sine-Gordon model

Abstract

We obtain nonperturbative results on the sine-Gordon model using the lattice field technique. In particular, we employ the Fourier accelerated hybrid Monte Carlo algorithm for our studies. We find the critical temperature of the theory based on autocorrelation time, as well as the finite size scaling of the "thickness" observable used in an earlier lattice study by Hasenbusch et al. We study the entropy, which is smooth across all temperatures, supportive of an infinite order transition. This system has a well-known duality with the massive Thirring model, which can play the role of a toy model for Montonen-Olive duality in N=4 super-Yang Mills theory, since it relates solitons to elementary field excitations. Our research lays a groundwork for such study on the lattice.