S. Gottlieb et al., THERMODYNAMICS OF LATTICE QCD WITH 2 LIGHT QUARKS ON A 16(3) X 8 LATTICE, Physical review. D. Particles and fields, 47(8), 1993, pp. 3619-3632
We have carried out a numerical study of the high-temperature behavior
of lattice QCD with two flavors of staggered quarks. Our simulations
were performed on 16(3) x 8 lattices with a quark mass m(q) = 0.0125,
in units of the inverse lattice spacing. By monitoring the Wilson-Poly
akov line, the chiral order parameter [psipsiBAR), and the average pla
quette, we have determined that a crossover between the low-temperatur
e state of ordinary hadronic matter and the high-temperature quark-glu
on plasma occurs at a gauge coupling of 6/g2 = 5.54(2). Thermodynamic
quantities do not show a large jump, although the equilibration time b
ecomes quite long in the vicinity of the crossover. We have measured t
he entropy densities in the neighborhood of the crossover and further
into the plasma phase. Measurements of the hadronic screening lengths
and the Debye screening lengths were made which cast light on the diff
erences between the two regimes. Finally, we measured the topological
susceptibilities to further explore the chiral properties of QCD.