Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-02-24
Nucl.Phys.Proc.Suppl.192-193:193-196,2009
Physics
High Energy Physics
High Energy Physics - Theory
5 pages, 2 figures; expanded version of contribution to the Cargese 2008 proceedings
Scientific paper
10.1016/j.nuclphysbps.2009.07.07
In arXiv:0805.0150 [hep-th] and arXiv:0812.2909 [hep-th] a general prescription was presented for the computation of real-time correlation functions using the gauge/gravity duality. I apply this prescription to the specific case of retarded thermal correlation functions and derive the usual ingoing boundary conditions at the horizon for bulk fields. The derivation allows me to clarify various issues, in particular the generalization to higher-point functions and the relevance of including the regions beyond the horizon.
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