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Noncompact quantum electrodynamics in three Euclidean dimensions with N species of four-component Dirac fermions is simulated by lattice-gauge-theory techniques. On an 8³ lattice we find chiral-symmetry breaking in the continuum limit for N{≤}Nc but no symmetry breaking for N{≥}Nc, with Nc=3.5±{}0.5. A physical picture of our results is presented.
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Dagotto et al. (1989) studied this question.
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