Exact Inflation Braneworlds

Details Exact Inflation Braneworlds Exact Inflation Braneworlds

2001-02-05

arxiv.org/abs/gr-qc/0102016v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages RevTeX. Submitted to Physical Review D

Scientific paper

In Randall-Sundrum type braneworld cosmologies, the dynamical equations on the three-brane differ from the general relativity equations by terms that carry the effects of embedding and of the free gravitational field in the five-dimensional bulk. In a FRW ansatze for the metric, we present two methods for deriving inflationary solutions to the covariant non-linear dynamical equations for the gravitational and matter fields on the brane. In the first approach we examine the constraints on the dynamical relationship between the cosmological scale factor and the scalar field driving self-interaction potential, imposed by the weak energy condition. We then investigate inflationary solutions obtained from a scalar field superpotential. Both these techniques for solving the braneworld field equations are illustrated by flat curvature models.

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