Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-05-22
Int.J.Mod.Phys.D20:1705-1712,2011
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
5 pages, small flaws corrected. Accepted for its publication in International Journal of Modern Physics D
Scientific paper
10.1142/S0218271811019736
We investigate a k-essence field localized on the brane evolving linearly with the cosmological time for arbitrary kinetic functions and consider the atypical k-essence model for linear and nonlinear k-fields in Friedmann-Robertson-Walker (FRW) cosmology. In the former case the k-field is driven by an inverse quadratic polynomial potential and the solutions exhibit several different behaviors which include expanding, contracting and bouncing universes as well as a model with a finite time span, some of them ending in a big crunch or a big rip. In the latter case we find the potential and show that the atypical k-essence model is dynamically uncomplete. Particularly, by selecting the extended tachyonic kinetic functions we analyze the high and low energy limits of our model, obtaining the nearly power law solution. We introduce a tachyon field with negative energy density and show that the universe evolves between two singularities.
Chimento Luis P.
Richarte Martín G.
No associations
LandOfFree
k-essence and tachyons in brane-worlds 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 k-essence and tachyons in brane-worlds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and k-essence and tachyons in brane-worlds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-499116