Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-05-21
JHEP 0303:018,2003
Physics
High Energy Physics
High Energy Physics - Theory
20 pages, 2 figures; v2, references added and minor corrections
Scientific paper
10.1088/1126-6708/2003/03/018
We study the cosmology induced on a brane probing a warped throat region in a Calabi-Yau compactification of type IIB string theory. For the case of a BPS D3-brane probing the Klebanov-Strassler warped deformed conifold, the cosmology described by a suitable brane observer is a bouncing, spatially flat Friedmann-Robertson-Walker universe with time-varying Newton's constant, which passes smoothly from a contracting to an expanding phase. In the Klebanov-Tseytlin approximation to the Klebanov-Strassler solution the cosmology would end with a big crunch singularity. In this sense, the warped deformed conifold provides a string theory resolution of a spacelike singularity in the brane cosmology. The four-dimensional effective action appropriate for a brane observer is a simple scalar-tensor theory of gravity. In this description of the physics, a bounce is possible because the relevant energy-momentum tensor can classically violate the null energy condition.
Kachru Shamit
McAllister Liam
No associations
LandOfFree
Bouncing Brane Cosmologies from Warped String Compactifications 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 Bouncing Brane Cosmologies from Warped String Compactifications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bouncing Brane Cosmologies from Warped String Compactifications will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-454934