On thermalization and isotropization of a boost-invariant non Abelian plasma

L. Bellantuono, P. Colangelo, F. De Fazio, F. Giannuzzi

Published 2015-03-06Version 1

Using a holographic method, we further investigate the relaxation towards the hydrodynamic regime of a boost-invariant non Abelian plasma taken out-of-equilibrium. In the dual description, the system is driven out-of-equilibrium by a deformation of the boundary metric, as proposed by Chesler and Yaffe. The effects of several deformation profiles on the bulk geometry are investigated by the analysis of the corresponding solutions of the Einstein equations. In particular, the times of restoration of the hydrodynamic regime and of the pressure isotropy are determined: setting the effective temperature of the system at the beginning of thermalization to $T_{eff}(\tau^*)=500$ MeV, pressure isotropization is reached after a lapse of time of ${\cal O}$(1 fm/c).