Conformal invariance at a deconfinement phase transition in (2+1) dimensions

Abstract
The conformal dimension of the Polyakov line at the deconfinement phase transition of (2+1)-dimensional SU(2) lattice gauge theory is determined numerically using two-dimensional finite-size conformal field theory. Excellent agreement with two-dimensional Ising-model values is found for both the renormalized coupling on a spatially toroidal geometry and the conformal dimensions on a finite-width strip geometry.