Non-compact QED(3) coupled to a four-fermi interaction
classification
✦ hep-lat
cond-mat.supr-conhep-ph
keywords
chiralfour-fermionnon-compactnumericalweakactionalgorithmallows
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We present preliminary numerical results for the three dimensional non-compact QED with a weak four-fermion term in the lattice action. Approaches based on Schwinger-Dyson studies, arguments based on thermodynamic inequalities and numerical simulations lead to estimates of the critical number of fermion flavors (below which chiral symmetry is broken) ranging from $N_{fc}=1$ to $N_{fc}=4$. The weak four-fermion coupling provides the framework for an improved algorithm, which allows us to simulate the chiral limit of massless fermions and expose delicate effects.
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