Reconstructing G inflation: From the attractors nS (N) and r (N)

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Abstract

The reconstruction of an inflationary universe in the context of the Galileon model or G-model, considering as attractors the scalar spectral index nS(N) and the tensor to scalar ratio r(N) as a function of the number of e-folding N is studied. By assuming a coupling of the form G(φ,X)=g(φ)X, we obtain the effective potential V and the coupling parameter g in terms of the cosmological parameters nS and r under the slow roll approximation. From some examples for nS(N) and r(N), different results for the effective potential V(φ) and the coupling parameter g(φ) are found.

Original languageEnglish
Article number023542
JournalPhysical Review D
Volume98
Issue number2
DOIs
StatePublished - 15 Jul 2018

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