Slow-roll inflation in the (R + R4) gravity

Sho Kaneda, Sergei V. Ketov, Natsuki Watanabe

Research output: Contribution to journal › Article

18 Citations (Scopus)

Abstract

We reconsider a toy model of topological inflation, based on the R 4-modified gravity. By using its equivalence to a certain scalar-tensor gravity model in four spacetime dimensions, we compute the inflaton scalar potential and investigate the possibility of inflation. We confirm the existence of slow-roll inflation with an exit. However, the model suffers from the η-problem that gives rise to the unacceptable value of the spectral index ns of scalar perturbations.

Original languageEnglish
Article number145016
JournalClassical and Quantum Gravity
Volume27
Issue number14
DOIs
Publication statusPublished - 2010

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gravitation
scalars
equivalence
tensors
perturbation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Slow-roll inflation in the (R + R4) gravity. / Kaneda, Sho; Ketov, Sergei V.; Watanabe, Natsuki.

In: Classical and Quantum Gravity, Vol. 27, No. 14, 145016, 2010.

Research output: Contribution to journal › Article

Kaneda, S, Ketov, SV & Watanabe, N 2010, 'Slow-roll inflation in the (R + R4) gravity', Classical and Quantum Gravity, vol. 27, no. 14, 145016. https://doi.org/10.1088/0264-9381/27/14/145016
Kaneda S, Ketov SV, Watanabe N. Slow-roll inflation in the (R + R4) gravity. Classical and Quantum Gravity. 2010;27(14). 145016. https://doi.org/10.1088/0264-9381/27/14/145016
Kaneda, Sho ; Ketov, Sergei V. ; Watanabe, Natsuki. / Slow-roll inflation in the (R + R4) gravity. In: Classical and Quantum Gravity. 2010 ; Vol. 27, No. 14.
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