LATTICE GAUGE THEORY OF GAUGED NAMBU–JONA-LASINIO MODEL

Using lattice gauge theory simulation, we investigate non-perturbative triviality of QED. Difficult problems with chiral limit is avoided by adding a small Z(2) symmetric four fermi interaction. The added term is irrelevant and its effect should disappear in the continuum limit. Furthermore, this term separates the phase transition associated with monopoles from the phase transition associated with chiral symmetry, which allows us to concentrate on the chiral phase transition. Our result extends perturbative triviality of QED to a non-perturbative regime.