Gauge Theory Duals of Cosmological Backgrounds and their Energy Momentum Tensors

Simple item page
dc.creatorAwad, Adel
dc.creatorDas, Sumit R.
dc.creatorNarayan, K.
dc.creatorTrivedi, Sandip P.
dc.date2007-11-19
dc.date2007-11-27
dc.date.accessioned2026-07-07T11:13:17Z
dc.date.available2026-07-07T11:13:17Z
dc.descriptionWe revisit Type IIB supergravity backgrounds with null and spacelike singularities with natural gauge theory duals proposed in {\tt hep-th/0602107} and {\tt hep-th/0610053}. We show that for these backgrounds there are always choices of the boundaries of these deformed $AdS_5 \times S^5$ space-times, such that the dual gauge theories live on {\it flat} metrics and have space-time dependent couplings. We present a new time dependent solution of this kind where the effective string coupling is always bounded and vanishes at a spacelike singularity in the bulk, and the space-time becomes $AdS_5 \times S^5$ at early and late times. The holographic energy momentum tensor calculated with a choice of flat boundary is shown to vanish for null backgrounds and to be generically non-zero for time dependent backgrounds.
dc.description17 pages, LaTeX, v2: minor modifications
dc.identifierhttps://arxiv.org/abs/0711.2994
dc.identifierhttp://arxiv.org/abs/0711.2994
dc.identifierPhys.Rev.D77:046008,2008
dc.identifierdoi:10.1103/PhysRevD.77.046008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191666
dc.subjectHigh Energy Physics - Theory
dc.titleGauge Theory Duals of Cosmological Backgrounds and their Energy Momentum Tensors
dc.typetext

Files

Collections

arXiv