Abstract
Quintessence scenarios provide a simple explanation for the observed acceleration of the Universe. Yet, explaining why acceleration did not start a long time ago remains a challenge. The idea that the transition from radiation to matter domination played a dynamical role in triggering acceleration has been put forward in various guises. We propose a simple dilaton-derived quintessence model in which temporary vacuum domination is naturally triggered by the radiation to matter transition. In this model Einstein's gravity is preserved but quintessence couples non-minimally to the cold dark matter, but not to ``visible'' matter. Such couplings have been attributed to the dilaton in the low-energy limit of string theory beyond tree level. We also show how a cosmological constant in the string frame translates into a quintessence-type of potential in the atomic frame.
Keywords
QuintessencePhysicsDark energyDilatonCosmological constantString (physics)AccelerationTheoretical physicsDark fluidUniverseString theoryCold dark matterAstrophysicsDark matterClassical mechanicsCosmology
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Publication Info
- Year
- 2001
- Type
- article
- Volume
- 517
- Issue
- 1-2
- Pages
- 177-183
- Citations
- 78
- Access
- Closed
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Cite This
Rachel Bean,
João Magueijo
(2001).
Dilaton-derived quintessence scenario leading naturally to the late-time acceleration of the Universe.
Physics Letters B
, 517
(1-2)
, 177-183.
https://doi.org/10.1016/s0370-2693(01)00966-2
Identifiers
- DOI
- 10.1016/s0370-2693(01)00966-2