Exact Chiral Invariance at Finite Density on Lattice

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

References in corpus (9)

• QCD at finite chemical potential with six time slices
• STAR experiment results from the beam energy scan program at RHIC
• Overlap Dirac operator at nonzero chemical potential and random matrix theory
• Breakdown of staggered fermions at nonzero chemical potential
• Net-baryon number fluctuations in (2+1)-flavor QCD
• Domain-wall and overlap fermions at nonzero quark chemical potential
• Thermodynamics of the ideal overlap quarks on the lattice
• Exact chiral invariance at finite density on the lattice
• Introduction of the chemical potential in the overlap formalism