Crossing of the w=-1 Barrier by D3-brane Dark Energy Model

Details Crossing of the w=-1 Barrier by D3-brane Dark Energy Model Crossing of the w=-1 Barrier by D3-brane Dark Energy Model

2005-07-04

arxiv.org/abs/astro-ph/0507067v2

Phys.Rev.D72:064017,2005

Astronomy and Astrophysics

Astrophysics

LaTeX, 21 pages, 4 figures, references added

Scientific paper

10.1103/PhysRevD.72.064017

We explore a possibility for the Universe to cross the w=-1 cosmological constant barrier for the dark energy state parameter. We consider the Universe as a slowly decaying D3-brane. The D3-brane dynamics is approximately described by a nonlocal string tachyon interaction and a back reaction of gravity is incorporated in the closed string tachyon dynamics. In a local effective approximation this model contains one phantom component and one usual field with a simple polynomial interaction. To understand cosmological properties of this system we study toy models with the same scalar fields but with modified interactions. These modifications admit polynomial superpotentials. We find restrictions on these interactions under which it is possible to reach w=-1 from below at large time. Explicit solutions with the dark energy state parameter crossing/non-crossing the barrier w=-1 at large time are presented.

Affiliated with

Also associated with

No associations

Rating

Crossing of the w=-1 Barrier by D3-brane Dark Energy Model 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 Crossing of the w=-1 Barrier by D3-brane Dark Energy Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crossing of the w=-1 Barrier by D3-brane Dark Energy Model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-466969