Inflation and Dark Energy from a Scalar Field in Supergravity
Mar 25, 2015Citations per year
Abstract: (arXiv)
In this paper we present a model for accelerated expansion of the universe, both during inflation and the present stage of the expansion, from four dimensional supergravity. We evaluate the tensor-to-scalar ratio (), the scalar spectral index () and the running spetral index (), and we notice that these parameters are in agreement with Planck+WP+lensing data and with BICEP2/Keck and Planck joint analysis, at CL. The number of e-folds is or higher. The reheating period has an associated temperature GeV, which agrees with the one required by thermal leptogenesis. Regarding the scalar field as dark energy, the autonomous system for it in the presence of a barotropic fluid provides a stable fixed point that leads to a late-time accelerated expansion of the universe, with an equation of state that mimics the cosmological constant ().Note:
- This paper has been withdrawn by the author due to a numerical error
- expansion: acceleration
- field theory: scalar
- power spectrum: scalar
- fixed point: stability
- leptogenesis: thermal
- supergravity: 1
- dark energy
- inflation
- cosmological constant
References(28)
Figures(6)
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