Scalar perturbations in braneworld cosmology

Details Scalar perturbations in braneworld cosmology Scalar perturbations in braneworld cosmology

2007-05-11

arxiv.org/abs/0705.1685v1

JCAP 0707:008,2007

Astronomy and Astrophysics

Astrophysics

17 pages, 7 figures

Scientific paper

10.1088/1475-7516/2007/07/008

We study the behaviour of scalar perturbations in the radiation-dominated era of Randall-Sundrum braneworld cosmology by numerically solving the coupled bulk and brane master wave equations. We find that density perturbations with wavelengths less than a critical value (set by the bulk curvature length) are amplified during horizon re-entry. This means that the radiation era matter power spectrum will be at least an order of magnitude larger than the predictions of general relativity (GR) on small scales. Conversely, we explicitly confirm from simulations that the spectrum is identical to GR on large scales. Although this magnification is not relevant for the cosmic microwave background or measurements of large scale structure, it will have some bearing on the formation of primordial black holes in Randall-Sundrum models.

Affiliated with

Also associated with

No associations

Rating

Scalar perturbations in braneworld cosmology 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 Scalar perturbations in braneworld cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar perturbations in braneworld cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-411796