Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2003-09-18
Phys.Rev. D69 (2004) 034501
Physics
High Energy Physics
High Energy Physics - Lattice
12 pages, revised after referee report, to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.69.034501
In studies of the QCD deconfining phase transition or crossover by means of heavy ion experiments, one ought to be concerned about non-equilibrium effects due to heating and cooling of the system. Motivated by this, we look at hysteresis methods to study the dynamics of phase transitions. Our systems are temperature driven through the phase transition using updating procedures in the Glauber universality class. Hysteresis calculations are presented for a number of observables, including the (internal) energy, properties of Fortuin-Kasteleyn clusters and structure functions. We test the methods for 2d Potts models, which provide a rich collection of phase transitions with a number of rigorously known properties. Comparing with equilibrium configurations we find a scenario where the dynamics of the transition leads to a spinodal decomposition which dominates the statistical properties of the configurations. One may expect an enhancement of low energy gluon production due to spinodal decomposition of the Polyakov loops, if such a scenario is realized by nature.
Berg Bernd A.
Heller Urs M.
Meyer-Ortmanns Hildegard
Velytsky Alexander
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