Lowest eigenvalues of the Dirac operator for two color QCD at nonzero chemical potential

Bittner, Elmar; Lombardo, Maria-Paola; Markum, Harald; Pullirsch, Rainer

Lowest eigenvalues of the Dirac operator for two color QCD at nonzero chemical potential

Authors

Bittner, Elmar

Lombardo, Maria-Paola

Markum, Harald

Pullirsch, Rainer

Description

We investigate the eigenvalue spectrum of the staggered Dirac matrix in SU(3) and U(1) gauge theory as well as in full QCD with two colors and finite chemical potential. Along the strong-coupling axis up to the phase transition, the low-lying Dirac spectrum of these quantum field theories is well described by random matrix theory and exhibits universal behavior. Related results for gauge theories with minimal coupling are discussed in the chirally symmetric phase and no universality is seen for the microscopic spectral densities.
Lattice2001(hightemp), 3 pages, 9 figures