Brane tachyon dynamics

Details Brane tachyon dynamics Brane tachyon dynamics

2010-06-11

arxiv.org/abs/1006.2192v1

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 12 figs, to appear in PLB

Scientific paper

10.1016/j.physletb.2010.06.006

The dynamics of a tachyon attached to a Dvali, Gabadadze and Porrati (DGP) brane is investigated. Exponential potential and inverse power law potential are explored, respectively. The quasi-attractor behavior, for which the universe will eventually go into a phase similar to the slow-roll inflation, is discovered in both cases of exponential potential and inverse power law potential. The equation of state (EOS) of the virtual dark energy for a single scalar can cross the phantom divide in the branch $\theta=-1$ for both potentials, while the EOS of the virtual dark energy for a single scalar can not cross this divide in the branch $\theta=1$.

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