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 (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.

4 pages, 1 figure, uses REVTEX4. v3: improved figure, version to appear in Phys. Rev. Lett

References in corpus (2)

• Dissipative Hydrodynamics and Heavy Ion Collisions
• Anomalous Viscosity of an Expanding Quark-Gluon Plasma

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