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

Sho Kaneda, Sergei V. Ketov, Natsuki Watanabe

Research output: Contribution to journalArticle

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

Fingerprint

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 journalArticle

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.
@article{8eae1d8d742b4d9391fd4bfd313edcf6,
title = "Slow-roll inflation in the (R + R4) gravity",
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.",
author = "Sho Kaneda and Ketov, {Sergei V.} and Natsuki Watanabe",
year = "2010",
doi = "10.1088/0264-9381/27/14/145016",
language = "English",
volume = "27",
journal = "Classical and Quantum Gravity",
issn = "0264-9381",
publisher = "IOP Publishing Ltd.",
number = "14",

}

TY - JOUR

T1 - Slow-roll inflation in the (R + R4) gravity

AU - Kaneda, Sho

AU - Ketov, Sergei V.

AU - Watanabe, Natsuki

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=77953494284&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953494284&partnerID=8YFLogxK

U2 - 10.1088/0264-9381/27/14/145016

DO - 10.1088/0264-9381/27/14/145016

M3 - Article

AN - SCOPUS:77953494284

VL - 27

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

SN - 0264-9381

IS - 14

M1 - 145016

ER -