QED3 on a space-time lattice: a comparison between compact and noncompact formulation
Roberto Fiore, Pietro Giudice, Domenico Giuliano, Donatella Marmottini, Alessandro Papa, Pasquale Sodano
Abstract
Quantum electrodynamics in a (2+1)-dimensional space-time has been object of studies both as effective theory for the pseudogap phase of high-Tc superconductors and for the theoretical investigation of mechanisms of confinement in presence of matter fields. We discretize the theory using both compact and noncompact formulations, analyze the behavior of the chiral condensate and of the monopole density and compare them. Finally we draw some conclusions about the possible equivalence of the two lattice formulations.
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