Expanding Cosmologies in Brane Geometries

Details Expanding Cosmologies in Brane Geometries Expanding Cosmologies in Brane Geometries

2003-08-19

arxiv.org/abs/hep-th/0308125v1

Phys.Rev. D69 (2004) 043505

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, LaTex/RevTex4

Scientific paper

10.1103/PhysRevD.69.043505

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.

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