May 22 – 28, 2011
Centre Bonlieu
Europe/Zurich timezone

Understanding the equilibration of matter from time-dependent correlator

Not scheduled
Théâtre National (Centre Bonlieu)

Théâtre National

Centre Bonlieu

Board: 119
Poster New theoretical developments


Dr Shu Lin (MPI for Physics, Munich)


The fast thermalization of Quark Gluon Plasma, as suggested by hydrodynamical simulation, is one of the central questions of heavy ion collisions. Theoretical understanding of the mechanism involves field theory out of equilibrium. While the perturbative method becomes less effective due to the strong coupling, the gauge/gravity duality can play an important role. In [1], we studied a gravitational collapse model, which is dual to an equilibration process of a homogeneous QGP. We found that the near-equilibrium correlators of different operators approach their thermal counterpart in a universal fashion. As a first step to explore the far from equilibrium regime, we studied a model with a moving mirror in AdS space [2]. We solved the spatially integrated time-dependent correlator in the dual field theory and found that the singularities of the correlator are consistent with the bulk-cone singularities conjecture [3]. Furthermore, we found a recursive relation among the leading order divergence of the singularities, which allow us to determine the divergences without solving the correlator explicitly [4]. Possible extension to a more realistic equilibration model will be discussed. [1] S.~Lin and E.~Shuryak, Phys.\ Rev.\ D {\bf 79} (2009) 124015 [arXiv:0902.1508 [hep-th]]. [2] J.~Erdmenger, S.~Lin and T.~H.~Ngo, JHEP {\bf 1104} (2011) 035 arXiv:1101.5505 [hep-th]. [3] V.~E.~Hubeny, H.~Liu and M.~Rangamani, JHEP {\bf 0701} (2007) 009 [arXiv:hep-th/0610041]. [4] J.~Erdmenger, C.~ Hoyos, S.~Lin and T.~H.~Ngo, to appear.

Primary author

Dr Shu Lin (MPI for Physics, Munich)


Prof. Erdmenger Johanna (MPI for Physics, Munich) Mr Ngo Thanh Hai (MPI for Physics, Munich) Prof. Shuryak Edward (Stony Brook University)

Presentation materials