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Constant roll inflation in multifield models

Aug 17, 2020

13 pages

Published in:

Phys.Rev.D 102 (2020) 123528

Published: Dec 16, 2020

e-Print:

2008.07260 [gr-qc]

DOI:

10.1103/PhysRevD.102.123528

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Abstract: (arXiv)

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.

Note:

13 pages, 4 figures

References(49)

Figures(8)

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