Supersymmteric Null-like Holographic Cosmologies

Details Supersymmteric Null-like Holographic Cosmologies Supersymmteric Null-like Holographic Cosmologies

2006-02-13

arxiv.org/abs/hep-th/0602124v2

JHEP0605:013,2006

Physics

High Energy Physics

High Energy Physics - Theory

26 pages;v2 references added

Scientific paper

10.1088/1126-6708/2006/05/013

We construct a new class of 1/4-BPS time dependent domain-wall solutions with null-like metric and dilaton in type II supergravities, which admit a null-like big bang singularity. Based on the domain-wall/QFT correspondence, these solutions are dual to 1/4-supersymmetric quantum field theories living on a boundary cosmological background with time dependent coupling constant and UV cutoff. In particular we evaluate the holographic $c$ function for the 2-dimensional dual field theory living on the corresponding null-like cosmology. We find that this $c$ function runs in accordance with the $c$-theorem as the boundary universe evolves, this means that the number of degrees of freedom is divergent at big bang and suggests the possible resolution of big bang singularity.

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