Non-compact QED(3) coupled to a four-fermi interaction

Details Non-compact QED(3) coupled to a four-fermi interaction Non-compact QED(3) coupled to a four-fermi interaction

2004-09-10

arxiv.org/abs/hep-lat/0409038v1

Nucl.Phys.Proc.Suppl. 140 (2005) 701-703

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, Contribution to Lattice2004(chiral), Fermilab, June 21-26, 2004

Scientific paper

10.1016/j.nuclphysbps.2004.11.13

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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