Linearized hydrodynamics from probe-sources in the gauge-string duality

Details Linearized hydrodynamics from probe-sources in the gauge-string duality Linearized hydrodynamics from probe-sources in the gauge-string duality

2008-03-01

arxiv.org/abs/0803.0081v1

Nucl.Phys.B813:188-219,2009

Physics

High Energy Physics

High Energy Physics - Theory

43 pages, 3 appendices

Scientific paper

10.1016/j.nuclphysb.2008.12.032

We study the response of an infinite, asymptotically static N=4 plasma to a generic localized source in the probe approximation. At large distances, the energy momentum tensor of the plasma includes a term which satisfies the constitutive relations of linearized hydrodynamics, but it can also include a non-hydrodynamical term which contributes at the same order as viscous corrections, or even at leading order in some cases. The conditions for the appearance of a laminar wake far behind the source and its relevance for phenomenological models used to explain di-hadron correlations are discussed. We also consider the energy momentum tensor near the source, where the hydrodynamical approximation can be expected to break down. Our analysis encompasses a wide range of sources which are localized in the bulk of AdS, including trailing strings, mesonic and baryonic configurations of strings, and point particles.

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