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Crossing thew=−1barrier in the D3-brane dark energy model
Open accessAbstract
We explore a possibility for the Universe to cross the $w=\ensuremath{-}1$ cosmological constant barrier for the dark energy state parameter. We consider the Universe as a slowly decaying D3-brane. The D3-brane dynamics are approximately described by a nonlocal string tachyon interaction and the backreaction of gravity is incorporated in the closed string tachyon dynamics. In a local effective approximation this model contains one phantom component and one usual field with a simple polynomial interaction. To understand cosmological properties of this system we study toy models with the same scalar fields but with modified interactions. These modifications admit polynomial superpotentials. We find restrictions on these interactions under which it is possible to reach $w=\ensuremath{-}1$ from below at large time. Explicit solutions with the dark energy state parameter crossing or not crossing the barrier $w=\ensuremath{-}1$ at large time are presented.
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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Measurements of Ω and Λ from 42 High‐Redshift Supernovae
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False vacuum inflation with Einstein gravity
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What does inflation really predict?
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Modified gravity theories on a nutshell: Inflation, bounce and late-time evolution
Nojiri, S., Odintsov, S. D., & Oikonomou, V. K. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.06.001 · Cited by 2,734
Bamba, K., Capozziello, S., Nojiri, S., & Odintsov, S. D. (2012) · Astrophysics and Space Science · doi:10.1007/s10509-012-1181-8 · Cited by 2,387
Qiu, T., Evslin, J., Cai, Y.-F., Li, M., & Zhang, X. (2011) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2011/10/036 · Cited by 206
Metadata
- Authors
- Aref’eva, I. Y., Koshelev, A. S., & Vernov, S. Y.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2005-09-23
- Volume
- 72
- Issue
- 6
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W2160115556
- Cited by
- 232
- References
- 6
- FWCI
- 18.15
- Type
- journal article
- Language
- en
- Open access
- green
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