Dirac Spectra and Real QCD at Nonzero Chemical Potential
arXiv:hep-th/0208021 · doi:10.1142/9789812776310_0018
Abstract
We show that QCD Dirac spectra well below Lambda_{QCD}, both at zero and at nonzero chemical potential, can be obtained from a chiral Lagrangian. At nonzero chemical potential Goldstone bosons with nonzero baryon number condense beyond a critical value. Such superfluid phase transition is likely to occur in any system with a chemical potential with the quantum numbers of the Goldstone bosons. We discuss the phase diagram for one such system, QCD with two colors, and show the existence of a tricritical point in an effective potential approach.
26 pages, 8 Postscript figures, Invited talk at Symposium and Workshop "Continuous Advances in QCD 2002 / Arkadyfest", May 17-23, 2002