Brane worlds, string cosmology, and AdS/CFT

LUIS ANCHORDOQUI; JOSE EDELSTEIN; CARLOS NÚÑEZ; SANTIAGO PEREZ BERGLIAFFA; MARTIN SCHVELLINGER; MARTA TROBO; FABIO IVÁN ZYSERMAN

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2001 vol. 64 p. 1 - 13

1550-7998

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 nonsingular 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 anonperturbative description of brane-world string cosmology.