Relaxation time of non-conformal plasma

Details Relaxation time of non-conformal plasma Relaxation time of non-conformal plasma

2009-08-03

arxiv.org/abs/0908.0108v2

Phys.Lett.B681:200-203,2009

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 1 figure; v2: references added

Scientific paper

10.1016/j.physletb.2009.10.007

We study effective relaxation time of viscous hydrodynamics of strongly coupled non-conformal gauge theory plasma using gauge theory/string theory correspondence. We compute leading corrections to the conformal plasma relaxation time from the relevant deformations due to dim-2 and dim-3 operators. We discuss in details the relaxation time tau_eff of N=2^* plasma. For a certain choice of masses this theory undergoes a phase transition with divergent specific heat c_V ~ |1-T_c/T|^(-1/2). Although the bulk viscosity remains finite all the way to the critical temperature, we find that tau_eff diverges near the critical point as tau_eff ~ |1-T_c/T|^(-1/2).

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