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arxiv: 1312.1322 · v4 · submitted 2013-12-04 · 🌀 gr-qc · hep-th

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Cosmology with non-minimal coupled gravity: inflation and perturbation analysis

F. Darabi , A. Parsiya
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classification 🌀 gr-qc hep-th
keywords analysisbehaviorcoupledinflationmodelperturbationconfrontconsideration
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We study a scalar-tensor cosmological model where the Einstein tensor is non-minimally coupled to the free scalar field dynamics. Using FRW metric, we investigate the behavior of scale factor for vacuum, matter and dark energy dominated eras. Especially, we focus on the inflationary behavior at early universe. Moreover, we study the perturbation analysis of this model in order to confront the inflation under consideration with the observational results.

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  1. Cosmological perturbations in the theory of gravity with non-minimal derivative coupling. I. Modes of perturbations

    gr-qc 2026-05 unverdicted novelty 5.0

    In gravity with non-minimal derivative coupling, scalar, vector, and tensor perturbation modes are all amplified during the early quasi-de Sitter stage, unlike in standard Friedmann cosmology.