Massive fermions without fermion bilinear condensates
Massive fermions without fermion bilinear condensates
We study a lattice field theory model containing two flavors of massless staggered fermions with an onsite four-fermion interaction. The model contains an SU(4) symmetry which forbids nonzero fermion bilinear mass terms, due to which there is a massless fermion phase at weak couplings. However, even at strong couplings fermion …