title: Plasma instabilities in an anisotropically expanding geometry.
abstract: We study (3+1)D kinetic (Boltzmann-Vlasov) equations for relativistic plasma particles in a one dimensionally expanding geometry motivated by ultrarelativistic heavy-ion collisions. We set up local equations in terms of Yang-Mills potentials and auxiliary fields that allow simulations of hard- (expanding-) loop dynamics on a lattice. We determine numerically the evolution of plasma instabilities in the linear (Abelian) regime and also derive their late-time behavior analytically, which is consistent with recent numerical results on the evolution of the so-called melting color-glass condensate. We also find a significant delay in the onset of growth of plasma instabilities which are triggered by small rapidity fluctuations, even when the initial state is highly anisotropic.
authors.affiliation: Fakultät für Physik, Universität Bielefeld, D-33501 Bielefeld, Germany.
authors.forename: Paul
authors.initials: P
authors.lastname: Romatschke
authors.forename: Anton
authors.initials: A
authors.lastname: Rebhan