Brane worlds, string cosmology, and AdS / CFT

LUIS ANCHORDOQUI, JOSE D. EDELSTEIN, CARLOS NUNEZ , SANTIAGO E. PEREZ BERGLIAFFA, MARTIN SCHVELLINGER, MARTA TROBO, FABIO ZYSERMAN

PHYSICAL REVIEW D - PARTICLE AND FILDS

APS - American Physical Society

Lugar: New York - USA; Año: 2001 vol. 64 p. 8402701 - 8402713

0556-2821

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.