Gauge Invariant Variational Approach with Fermions: the Schwinger Model
William E. Brown, Juan P. Garrahan, Ian I. Kogan, Alex Kovner
Abstract
We extend the gauge invariant variational approach of Phys. Rev. D52 (1995) 3719, hep-th/9408081, to theories with fermions. As the simplest example we consider the massless Schwinger model in 1+1 dimensions. We show that in this solvable model the simple variational calculation gives exact results.
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