Expanding Cosmologies in Brane Geometries

Abstract

Five dimensional gravity coupled, both in the bulk and on a brane, to a scalar Liouville field yields a geometry confined to a strip around the brane and with time dependent scale factors for the four geometry. In various limits known models can be recovered as well as a temporally expanding four geometry with a warp factor falling exponentially away from the brane. The effective theory on the brane has a time dependent Planck mass and ``cosmological constant''. Although the scale factor expands, the expansion is not an acceleration.

7 pages, LaTex/RevTex4

References in corpus (3)

• Brane cosmology: an introduction
• Accelerating Cosmologies from Compactification
• Accelerating Cosmologies from S-Branes

Cited by in corpus (6)

• Bloch Brane
• Degenerate and critical Bloch branes
• Brane World Cosmology In Jordan-Brans-Dicke Theory
• Gauges in the Bulk II: Models with Bulk Scalars
• The five dimensional universal hypermultiplet and the cosmological constant problem
• The nature of cosmological singularities in isotropic universes and braneworlds