Non-slow-roll dynamics in $\alpha-$attractors
Abstract
In this paper we consider the attractor model and study inflation under a non-slow-roll dynamics. More precisely, we follow the approach recently proposed by Gong and Sasaki \cite{Gong:2015ypa} by means of assuming . Within this framework we obtain a family of functions describing the local shape of the potential during inflation. We study a specific model and find an inflationary scenario predicting an attractor at and . We further show that considering a non-slow-roll dynamics, the attractor model can be broaden to a wider class of models that remain compatible with value of . We further explore the model parameter space with respect to large and small field inflation and conclude that the inflaton dynamics is connected to the parameter, which is also related to the K\"ahler manifold curvature in the supergravity (SUGRA) embedding of this model. We also comment on the stabilization of the inflaton's trajectory.
Keywords
Cite
@article{arxiv.1506.05366,
title = {Non-slow-roll dynamics in $\alpha-$attractors},
author = {K. Sravan Kumar and João Marto and Paulo Vargas Moniz and Suratna Das},
journal= {arXiv preprint arXiv:1506.05366},
year = {2016}
}
Comments
17 pages, 6 figures, version accepted in JCAP