The dynamics of scalar-tensor cosmology from RS two-brane model

Details The dynamics of scalar-tensor cosmology from RS two-brane model The dynamics of scalar-tensor cosmology from RS two-brane model

2007-01-08

arxiv.org/abs/gr-qc/0701048v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, 2 figures, to appear in Proc. of 11th Marcel Grossmann Meeting (Berlin, July 23-29, 2006)

Scientific paper

We consider Randall-Sundrum two-brane cosmological model in the low energy gradient expansion approximation by Kanno and Soda. It is a scalar-tensor theory with a specific coupling function. We find a first integral of equations for the A-brane metric and estimate constraints for the dark radiation term. We perform a complementary analysis of the dynamics of the scalar field (radion) using phase space methods and examine convergence towards the limit of general relativity. We find that it is possible to stabilize the radion at a finite value with suitable negative matter densities on the B-brane.

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