Nonminimally coupled inflation with initial conditions from a preinflation anamorphic contracting era

McDonald, John (2016) Nonminimally coupled inflation with initial conditions from a preinflation anamorphic contracting era. Physical Review D, 94 (4). ISSN 1550-7998

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Abstract

Inflation due to a non-minimally coupled scalar field with a large non-minimal coupling, as first proposed by Salopek, Bardeen and Bond (SBB), is in good agreement with the observed value of the spectral index and constraints on the tensor-to-scalar ratio. Here we explore the possibility that SBB inflation represents the late stage of a Universe which emerges from an early contracting era. We present a model in which the Universe smoothly transitions from an anamorphic contracting era to late-time SBB inflation without encountering a singular bounce. This corresponds to a continuous expansion in the Einstein frame throughout. We show that the anamorphic contracting era is able to provide the smooth superhorizon initial conditions necessary for subsequent SBB inflation to occur. The model predicts corrections to the non-minimal coupling, kinetic term and potential of SBB inflation which can observably increase the observed spectral index relative to its SBB prediction.

Item Type: Journal Article
Journal or Publication Title: Physical Review D
Additional Information: © 2015 American Physical Society
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 82507
Deposited By: ep_importer_pure
Deposited On: 02 Nov 2016 14:28
Refereed?: Yes
Published?: Published
Last Modified: 20 Sep 2019 01:11
URI: https://eprints.lancs.ac.uk/id/eprint/82507

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