Strong coupling isotropization simplified

Details Strong coupling isotropization simplified Strong coupling isotropization simplified

2012-02-05

arxiv.org/abs/1202.0981v1

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 4 figures

Scientific paper

We study the isotropization of a homogeneous, strongly coupled, non-Abelian plasma by means of its gravity dual. We compare the time evolution of a large number of initially anisotropic states as determined, on the one hand, by the full non-linear Einstein's equations and, on the other, by the Einstein's equations linearized around the final equilibrium state. The linear approximation works remarkably well even for states that exhibit large anisotropies. For example, it predicts with a 20% accuracy the isotropization time, which is of order t_iso \lesssim 1/T, with T the final equilibrium temperature. We comment on possible extensions to less symmetric situations.

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