Boundary Inflation in the Moduli Space Approximation

Details Boundary Inflation in the Moduli Space Approximation Boundary Inflation in the Moduli Space Approximation

2003-10-22

arxiv.org/abs/astro-ph/0310643v2

Phys.Rev. D69 (2004) 063519

Astronomy and Astrophysics

Astrophysics

New reference added. 16 Pages, 13 Figures, RevTeX

Scientific paper

10.1103/PhysRevD.69.063519

The evolution of slow--roll inflation in a five--dimensional brane world model with two boundary branes and bulk scalar field is studied. Assuming that the inflationary scale is below the brane tension, we can employ the moduli space approximation to study the dynamics of the system. Detuning the brane tension results in a potential for the moduli fields which we show will not support a period of slow--roll inflation. We then study an inflaton field, confined to the positive tension brane, to which the moduli fields are non--minimally coupled. We discuss in detail the two cases of $V(\chi) = {1/2} m^2 \chi^2$ and $V(\chi) = \lambda \chi^4$ and demonstrate that increasing the coupling results in spectra which are further away from scale--invariance and in an increase in the tensor mode production, while entropy perturbations are subdominant. Finally, we point out that the five--dimensional spacetime is unstable during inflation because the negative tension brane collapses.

Affiliated with

Also associated with

No associations

Rating

Boundary Inflation in the Moduli Space Approximation 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 Boundary Inflation in the Moduli Space Approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boundary Inflation in the Moduli Space Approximation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-664422