Crossing w=-1 by a single scalar on a Dvali-Gabadadze-Porrati brane
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Astronomy, Beijing Normal University, Beijing 100875 (China)
Recent type Ia supernovae data seem to favor a dark energy model whose equation of state w(z) crosses -1, which is a much more amazing problem than the acceleration of the universe. Either the case that w(z) evolves from above -1 to below -1 or the case that w(z) runs from below -1 to above -1, is consistent with present data. In this paper we show that it is possible to realize the crossing behaviors of both of the two cases by only a single scalar field in frame of Dvali-Gabadadze-Porrati braneworld. At the same time we prove that there does not exist scaling solution in a universe with dust.
- OSTI ID:
- 20935210
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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