Cosmological acceleration from a gas of strings
arXiv:0907.1342 · doi:10.1016/j.nuclphysbps.2009.07.039
Abstract
In string gas cosmology, the extra dimensions of the underlying theory are kept at a microscopic scale by a gas of strings. In the matter-dominated era, however, dust pressure can lead to oscillations of the extra dimensions and to acceleration in the three visible dimensions, even with a vanishing cosmological term. We review the resulting oscillating expansion history, that provides an acceptable fit to the observed accelerated expansion of the Universe.
6 pages, 2 figures. Proceedings of the GGI Dark Matter and Dark Energy conference
References in corpus (18)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Cosmology and the Fate of Dilatation Symmetry
- Quintessence, Cosmic Coincidence, and the Cosmological Constant
- Constraints on the redshift dependence of the dark energy potential
- Constraining Cosmological Parameters Based on Relative Galaxy Ages
- Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
- New BBN limits on Physics Beyond the Standard Model from He4
- String Gas Cosmology
- Light propagation in statistically homogeneous and isotropic dust universes
- The Hubble Constant
- Hiding relativistic degrees of freedom in the early universe
- Why do we live in 3+1 dimensions?
- Relaxing to Three Dimensions
- Cosmological Effects of Radion Oscillations
- Dark energy and decompactification in string gas cosmology
- Fitting oscillating string gas cosmology to supernova data
- Lovelock inflation and the number of large dimensions