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arXiv · hep-ph/0605064

Plasma Instabilities in an Anisotropically Expanding Geometry

Paul Romatschke·Anton Rebhan
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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 (HEL) 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.

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Paul Romatschke, Anton Rebhan. 2006-12-14. Plasma Instabilities in an Anisotropically Expanding Geometry. https://doi.org/10.1103/physrevlett.97.252301

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