Constant roll inflation in multifield models
General Relativity and Quantum Cosmology
2021-01-04 v1 Cosmology and Nongalactic Astrophysics
Abstract
Constant roll inflation is analyzed in the presence of multi scalar fields which are assumed to be described by a constant roll rate each. The different cases are studied and the corresponding potentials are reconstructed. The exact solutions are obtained, which show a similar behaviour to the single scalar field model. For one of the cases analyzed in the paper, the so-called adiabatic field also constant rolls while entropy perturbations become null, while the second case may lead to non-adiabatic perturbations. Both cases can fit well the Planck data by assuming the appropriate values for the free parameters of the models.
Keywords
Cite
@article{arxiv.2008.07260,
title = {Constant roll inflation in multifield models},
author = {Merce Guerrero and Diego Rubiera-Garcia and Diego Saez-Chillon Gomez},
journal= {arXiv preprint arXiv:2008.07260},
year = {2021}
}
Comments
13 pages, 4 figures