A study of the phase transition in 4D pure compact U(1) LGT on toroidal and spherical lattices

Abstract

We have performed a systematic study of the phase transition in the pure compact U(1) lattice gauge theory in the extended coupling parameter space (β, γ) on toroidal and spherical lattices. The observation of a non-zero latent heat in both topologies for all investigated γin the interval [+0.2,-0.4], together with an effective exponent ν= 1/d when large enough lattices are considered, lead us to conclude that the phase transition is first order. For negative γ, our results point to an increasingly weak first order transition as γis made more negative.

References added; To appear in Nuc. Phys. B

References in corpus (2)

• On the SU(2)-Higgs Phase Transition
• Antiferromagnetic O(N) models in four dimensions

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