Heavy quark in an expanding plasma in AdS/CFT

Details Heavy quark in an expanding plasma in AdS/CFT Heavy quark in an expanding plasma in AdS/CFT

2009-04-12

arxiv.org/abs/0904.1874v2

JHEP 0906:002,2009

Physics

High Energy Physics

High Energy Physics - Theory

17 pages. v2: references added; improved comments on the Schwinger-Keldysh formalism

Scientific paper

10.1088/1126-6708/2009/06/002

Using the Janik-Peschanski dual to a Bjorken flow, a Langevin equation is derived for a heavy quark in an expanding N = 4 supersymmetric Yang-Mills plasma. Such a plasma is characterized by a proper-time dependence of the temperature and corresponds to a system out of equilibrium. The analysis first focuses on a quark at rest in the plasma comoving frame. The case of a quark moving across a longitudinally expanding plasma is then considered. The two-point functions for the random noise acting on such heavy quark probes are computed.

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