Gauge theory duals of cosmological backgrounds and their energy momentum tensors

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.046008· OSTI ID:21039207

Awad, Adel ^[1]; Das, Sumit R ^[1]; Narayan, K ^[2]; Trivedi, Sandip P ^[3]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)
2. Chennai Mathematical Institute, Padur PO, Siruseri 603103 (India)
3. Tata Institute of Fundamental Research, Mumbai 400005 (India)

We revisit type IIB supergravity backgrounds with null and spacelike singularities with natural gauge theory duals proposed in [S. R. Das, J. Michelson, K. Narayan, and S. P. Trivedi, Phys. Rev. D 74, 026002 (2006)] and [S. R. Das, J. Michelson, K. Narayan, and S. P. Trivedi, Phys. Rev. D 75, 026002 (2007)]. We show that for these backgrounds there are always choices of the boundaries of these deformed AdS{sub 5}xS{sup 5} space-times, such that the dual gauge theories live on 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{sub 5}xS{sup 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 nonzero for time dependent backgrounds.

• OSTI ID: 21039207
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
COUPLING
ENERGY-MOMENTUM TENSOR
GAUGE INVARIANCE
HOLOGRAPHY
MATHEMATICAL SOLUTIONS
METRICS
QUANTUM FIELD THEORY
SINGULARITY
SPACE-TIME
SUPERGRAVITY
TIME DEPENDENCE