Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-07-11
JCAP 0612:009,2006
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 5 figures
Scientific paper
10.1088/1475-7516/2006/12/009
We study the evolution of scalar curvature perturbations in a brane-world inflation model in a 5D Anti-de Sitter spacetime. The inflaton perturbations are confined to a 4D brane but they are coupled to the 5D bulk metric perturbations. We numerically solve full coupled equations for the inflaton perturbations and the 5D metric perturbations using Hawkins-Lidsey inflationary model. At an initial time, we assume that the bulk is unperturbed. We find that the inflaton perturbations at high energies are strongly coupled to the bulk metric perturbations even on subhorizon scales, leading to the suppression of the amplitude of the comoving curvature perturbations at a horizon crossing. This indicates that the linear perturbations of the inflaton field does not obey the usual 4D Klein-Gordon equation due to the coupling to 5D gravitational field on small scales and it is required to quantise the coupled brane-bulk system in a consistent way in order to calculate the spectrum of the scalar perturbations in a brane-world inflation.
Hiramatsu Takashi
Koyama Kazuya
No associations
LandOfFree
Numerical study of curvature perturbations in a brane-world inflation at high-energies 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 Numerical study of curvature perturbations in a brane-world inflation at high-energies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical study of curvature perturbations in a brane-world inflation at high-energies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-138320