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Title: Inflation in non-minimal matter-curvature coupling theories
Author: Rosa, João Pedro Trancoso Gomes
Gomes, Cláudio
Bertolami, Orfeu
Keywords: Inflation
Modified gravity
Issue Date: 2017
Publisher: IOP Publishing
Abstract: We study inflationary scenarios driven by a scalar field in the presence of a non-minimal coupling between matter and curvature. We show that the Friedmann equation can be significantly modified when the energy density during inflation exceeds a critical value determined by the non-minimal coupling, which in turn may considerably modify the spectrum of primordial perturbations and the inflationary dynamics. In particular, we show that these models are characterised by a consistency relation between the tensor-to-scalar ratio and the tensor spectral index that can differ significantly from the predictions of general relativity. We also give examples of observational predictions for some of the most commonly considered potentials and use the results of the Planck collaboration to set limits on the scale of the non-minimal coupling.
Peer review: yes
DOI: 10.1088/1475-7516/2017/06/021
ISSN: 1475-7516
Appears in Collections:CIDMA - Artigos
GGDG - Artigos

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