Inflation and late time acceleration in braneworld cosmological models with varying brane tension

Details Inflation and late time acceleration in braneworld cosmological models with varying brane tension Inflation and late time acceleration in braneworld cosmological models with varying brane tension

2010-05-18

arxiv.org/abs/1005.3101v1

Eur.Phys.J.C68:241-253,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages, 8 figures, accepted for publication in European Physical Journal C

Scientific paper

10.1140/epjc/s10052-010-1348-9

Braneworld models with variable brane tension $\lambda $ introduce a new degree of freedom that allows for evolving gravitational and cosmological constants, the latter being a natural candidate for dark energy. We consider a thermodynamic interpretation of the varying brane tension models, by showing that the field equations with variable $\lambda $ can be interpreted as describing matter creation in a cosmological framework. The particle creation rate is determined by the variation rate of the brane tension, as well as by the brane-bulk energy-matter transfer rate. We investigate the effect of a variable brane tension on the cosmological evolution of the Universe, in the framework of a particular model in which the brane tension is an exponentially dependent function of the scale factor. The resulting cosmology shows the presence of an initial inflationary expansion, followed by a decelerating phase, and by a smooth transition towards a late accelerated de Sitter type expansion. The varying brane tension is also responsible for the generation of the matter in the Universe (reheating period). The physical constraints on the model parameters, resulted from the observational cosmological data, are also investigated.

Affiliated with

Also associated with

No associations

Rating

Inflation and late time acceleration in braneworld cosmological models with varying brane tension does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Inflation and late time acceleration in braneworld cosmological models with varying brane tension, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation and late time acceleration in braneworld cosmological models with varying brane tension will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-57461