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Exact Chiral Fermions and Finite Density on Lattice

By Debasish Banerjee and Rajiv V. GavaiSayantan Sharma and Rajiv V. Gavai


Any µ 2-divergence is shown analytically to be absent for a class of actions for Overlap and Domain Wall Fermions with nonzero chemical potential. All such actions are, however, shown to violate the chiral invariance. While the parameter M of these actions can be shown to be irrelevant in the continuum limit, as expected, it is shown numerically that the continuum limit can be reached with relatively coarser lattices for 1.5 ≤ M ≤1.6

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