Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-10
Astronomy and Astrophysics
Astrophysics
Talk presented at Davis Inflation Meeting 2003 (astro-ph/0304225)
Scientific paper
In this lecture I will review the present status of inflation within string-based brane-world scenarios. The idea is to start from a supersymmetric configuration with two parallel static Dp-branes, and slightly break the supersymmetry conditions to produce a very flat potential for the field that parametrises the distance between the branes, i.e. the inflaton field. This breaking can be achieved in various ways. I will describe one of the simplest examples described in Ref. [1]: two almost parallel D4-branes in a flat compactified space, with a small relative angle between the branes, softly breaking supersymmetry. If the breaking parameter is sufficiently small, a large number of e-folds can be produced within the D-brane, for small changes of the configuration in the compactified directions. Such a process is local, i.e. it does not depend very strongly on the compactification space nor on the initial conditions. Moreover, the breaking induces a very small velocity and acceleration, which ensures very small slow-roll parameters and thus an almost scale invariant spectrum of metric fluctuations, responsible for the observed temperature and polarization anisotropies in the microwave background. Another prediction of the model is the small amplitude of the gravitational wave spectrum, which may not be detectable in the near future. Inflation ends as in hybrid inflation, triggered by the negative curvature of the string tachyon potential.
No associations
LandOfFree
Inflation from branes at angles 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 from branes at angles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation from branes at angles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-368292