Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725715 | Physics Letters B | 2010 | 10 Pages |
Abstract
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 θ=â1 for both potentials, while the EOS of the virtual dark energy for a single scalar cannot cross this divide in the branch θ=1.
Keywords
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
Hongsheng Zhang, Xin-Zhou Li, Hyerim Noh,