Hyperbolic inflationary model with nonzero curvature

Paliathanasis, Andronikos; Leon, Genly


We consider a cosmological model consisting of two scalar fields defined in the hyperbolic plane known as hyperbolic inflation. For the background space, we consider a homogeneous and isotropic spacetime with nonzero curvature. We study the asymptotic behaviour of solutions and search for attractors in the expanding regime. We prove that two hyperbolic inflationary stages are stable solutions that can solve the flatness problem and describe acceleration for both open and closed models, and additionally, we obtain a Milne-like attractor solution for the open model. We also investigate the contracting branch obtaining mirror solutions with the opposite dynamical behaviours. (C) 2022 The Author(s). Published by Elsevier B.V.

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Título según WOS: ID WOS:000890385300015 Not found in local WOS DB
Título de la Revista: PHYSICS LETTERS B
Volumen: 834
Editorial: Elsevier
Fecha de publicación: 2022


Notas: ISI