K-Inflation with a Dark Energy Coupling
arXiv:0906.0145 · doi:10.1103/PhysRevD.81.023506
Abstract
It is usually thought that the quintessence as a fundamental scalar field was already present during the inflationary epoch. While there are various models in which the quintessence couples to other species, it is attractive to anticipate a coupling between the quintessence and the inflaton in the very early universe as well. We consider such a coupling in the context of k-inflation. The coupling function and the potential of the quintessence are chosen to be of power law forms. We show such a coupling affects the speed of sound for the inflaton field as well as the power spectra of perturbations.
arXiv comment8 pages, 1 figure
References in corpus (17)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Dynamics of dark energy
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- Cosmological parameters from SDSS and WMAP
- Cosmology and the Fate of Dilatation Symmetry
- k-Inflation
- The 3D power spectrum of galaxies from the SDSS
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
- Perturbations in k-inflation
- Inflationary Cosmology
- Large Scale Cosmic Microwave Background Anisotropies and Dark Energy
- Initial conditions for quintessence after inflation
- Cosmological constraints on general, single field inflation
- Exploring Parameter Constraints on Quintessential Dark Energy: the Inverse Power Law Model
- Stochastic Quintessence
- Self-reproduction in k-inflation
- Slow-Roll Inflation in the Presence of a Dark Energy Coupling