Tachyon and Quintessence Brane-World Universe

Details Tachyon and Quintessence Brane-World Universe Tachyon and Quintessence Brane-World Universe

2009-03-24

arxiv.org/abs/0903.4144v2

Phys.Rev.D79:083527,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages. Version accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.79.083527

Using tachyon or quintessence fields along with a barotropic fluid on the brane we examine the different cosmological stages in a Friedmann-Robertson-Walker(FRW) universe, from the first radiation scenario to the later era dominated by cosmic string networks. We introduce a new algorithm to generalize previous works on exact solutions and apply it to study tachyon and quintessence fields localized on the brane and study the low and high energy regimes. We show that the tachyon and quintessence fields are driven by an inverse power law potential. Finally, we find several simples exacts solutions for tachyon and/or quintessence fields.

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