Exact Chiral Invariance at Finite Density on Lattice
arXiv:1210.7140 · doi:10.1088/1742-6596/432/1/012019
Abstract
A new lattice action is proposed for the overlap Dirac matrix with nonzero chemical potential. It is shown to preserve the full chiral invariance for all values of lattice spacing exactly. It is further demonstrated to arise in the domain wall formalism by coupling the chemical potential count only to the physically relevant wall modes.
5 pages, contribution to "Extreme QCD" workshop, 21-23 August 2012, Washington DC, USA