I investigate three-dimensional Abelian and non-Abelian gauge theories interacting with Dirac fermions. Using a variational method I evaluate the vacuum energy density in the one-loop approximation. It turns out that the states with a constant magnetic condensate lie below the perturbative ground state only in the case of three-dimensional quantum electrodynamics with massive fermions.
Vacuum stability for Dirac fermions in three dimensions
CEA, Paolo
1997-01-01
Abstract
I investigate three-dimensional Abelian and non-Abelian gauge theories interacting with Dirac fermions. Using a variational method I evaluate the vacuum energy density in the one-loop approximation. It turns out that the states with a constant magnetic condensate lie below the perturbative ground state only in the case of three-dimensional quantum electrodynamics with massive fermions.File in questo prodotto:
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