Spontaneous symmetry breaking in strong-coupling lattice QCD at high density
Abstract
We determine the patterns of spontaneous symmetry breaking in strong-coupling lattice QCD in a fixed background baryon density. We employ a next-nearest-neighbor fermion formulation that possesses the SU(Nf)xSU(Nf) chiral symmetry of the continuum theory. We find that the global symmetry of the ground state varies with Nf and with the background baryon density. In all cases the condensate breaks the discrete rotational symmetry of the lattice as well as part of the chiral symmetry group.
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