Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-04-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 14 figures; invited talk at NATO Advanced Study Institute: Structure and Dynamics of Elementary Matter, Kemer, Turke
Scientific paper
In this lecture we review recent progress in various aspects of non-equilibrium QFT with respect to relativistic heavy ion collisions. As a first and rather general study we summarize our (numerical) investigations for a dissipative quantum time evolution of $\phi^4$-field theory for a spatially homogeneous system in 2+1 space-time dimensions on the basis of the Kadanoff-Baym equations. The initial conditions can be chosen arbitrarily and far from equilibrium. The calculations demonstrate how thermalization and chemical equilibration is achieved ab initio from the underlying QFT. As a possible candidate for a non-equilibrium phase transition phenomena we then adress the stochastic formation of disoriented chiral condensates. Finally we elaborate on a new 3+1 dimensional Monte Carlo parton cascade solving kinetic Boltzmann processes including inelastic multiplication processes (gg<->ggg) in an unified manner, where the back reaction channel is treated for the first time fully consistently.
Greiner Carsten
Juchem S.
Xu Zhiyong
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