Brane Worlds, String Cosmology, and AdS/CFT

Details Brane Worlds, String Cosmology, and AdS/CFT Brane Worlds, String Cosmology, and AdS/CFT

2001-06-14

arxiv.org/abs/hep-th/0106127v2

Phys.Rev.D64:084027,2001

Physics

High Energy Physics

High Energy Physics - Theory

(v1) 31 pages revtex, 13 eps figures (v2) references added

Scientific paper

10.1103/PhysRevD.64.084027

Using the thin-shell formalism we discuss the motion of domain walls in de Sitter and anti-de Sitter (AdS) time-dependent bulks. This motion results in a dynamics for the brane scale factor. We show that in the case of a clean brane the scale factor describes both singular and non-singular universes, with phases of contraction and expansion. These phases can be understood as quotients of AdS spacetime by a discrete symmetry group. We discuss this effect in some detail, and suggest how the AdS/CFT correspondence could be applied to obtain a non perturbative description of brane-world string cosmology.

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