出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：A quasi-particle model is employed to derive from available lattice QCD calculations an equation
of state useable in hydrodynamical simulations of the expansion stage of strongly interacting
matter created in ultra-relativistic heavy-ion collisions. Various lattice results give an astonishing
agreement of the pressure as a function of energy density at large energy densities supposed
the pseudo-critical temperature is in the range 17015 MeV, while in the transition region the
equation of state is not yet well constrained. Therefore, one can construct a family of equations of
state by bridging the uncertain region from the uniquely given high-energy density region part to
a hadronic equation of state by suitable interpolation together with the extrapolation to non-zero
baryon density by means of the quasi-particle model. We present a series of tests of the model,
discuss the chiral extrapolation and the role of Landau damping. We also briefly sketch the path
of cosmic matter in the early universe in the phase diagram.
