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Galaxies 2013, 1(2), 96-106; doi:10.3390/galaxies1020096

Conformally Coupled Inflation

Physics Department and STAR Research Cluster, Bishop's University, 2600 College St., Sherbrooke, Québec J1M 1Z7, Canada
Received: 29 June 2013 / Revised: 19 July 2013 / Accepted: 19 July 2013 / Published: 30 July 2013
(This article belongs to the Special Issue Cosmology with Fluid Components)
View Full-Text   |   Download PDF [194 KB, uploaded 30 July 2013]

Abstract

A massive scalar field in a curved spacetime can propagate along the light cone, a causal pathology, which can, in principle, be eliminated only if the scalar couples conformally to the Ricci curvature of spacetime. This property mandates conformal coupling for the field driving inflation in the early universe. During slow-roll inflation, this coupling can cause super-acceleration and, as a signature, a blue spectrum of primordial gravitational waves.
Keywords: inflation; non-minimal coupling; early universe inflation; non-minimal coupling; early universe
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Faraoni, V. Conformally Coupled Inflation. Galaxies 2013, 1, 96-106.

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