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Quantum critical behavior in three dimensional lattice Gross-Neveu models
We study quantum critical behavior in three dimensional lattice Gross-Neveu models containing two four-component massless Dirac fermions. We focus on two models with $SU(2)$ flavor symmetry and either a ${Z}_{2}$ or a $U(1)$ chiral symmetry. Both models could not be studied earlier due to sign problems. We use the fermion …