Non-slow-roll dynamics in α-attractors

In this paper we consider the α−attractor model and study inflation under a non-slow-roll dynamics. More precisely, we follow the approach recently proposed by Gong and Sasaki [1] by means of assuming N=N(φ). Within this framework we obtain a family of functions describing the local shape of the pot...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2016-04, Vol.2016 (4), p.5-5
Main Authors: Kumar, K. Sravan, Marto, J., Moniz, P. Vargas, Das, Suratna
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ATTRACTORS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COSMOLOGICAL INFLATION
INFLATIONARY UNIVERSE
INFLATONS
POTENTIALS
SPACE
STABILIZATION
SUPERGRAVITY
TRAJECTORIES
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Summary:In this paper we consider the α−attractor model and study inflation under a non-slow-roll dynamics. More precisely, we follow the approach recently proposed by Gong and Sasaki [1] by means of assuming N=N(φ). 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 n{sub s}≈0.967 and r≈5.5×10{sup −4}. We further show that considering a non-slow-roll dynamics, the α−attractor model can be broaden to a wider class of models that remain compatible with value of r
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2016/04/005