Exact chiral invariance at finite density on the lattice

We propose a lattice action for the overlap Dirac matrix with nonzero chemical potential which is shown to preserve the chiral invariance on the lattice exactly. We further demonstrate it to arise in the domain wall formalism by letting the chemical potential count only the physically relevant wall...

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Veröffentlicht in:	Physics letters. B 2012-10, Vol.716 (3-5), p.446-449
Hauptverfasser:	Gavai, Rajiv V., Sharma, Sayantan
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemical potential Chiral symmetry Density Domain wall fermion Elementary particles Exact sciences and technology Formalism Invariance Lattices Nuclear physics Overlap fermion Physics Preserves QCD at finite density The physics of elementary particles and fields Walls
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Beschreibung
Zusammenfassung:	We propose a lattice action for the overlap Dirac matrix with nonzero chemical potential which is shown to preserve the chiral invariance on the lattice exactly. We further demonstrate it to arise in the domain wall formalism by letting the chemical potential count only the physically relevant wall modes.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2012.08.053