Inflation from higher dimensions

Hiroshi Nakada, Sergei V. Ketov

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We derive the scalar potential in four spacetime dimensions from an eight-dimensional (R+γR4-2Λ-F42) gravity model in the presence of the 4-form F4, with the (modified gravity) coupling constant γ and the cosmological constant Λ, by using the flux compactification of four extra dimensions on a 4-sphere with the warp factor. The scalar potential depends upon two scalar fields: the scalaron and the 4-sphere volume modulus. We demonstrate that it gives rise to a viable description of cosmological inflation in the early universe, with the scalaron playing the role of inflaton and the volume modulus to be (almost) stabilized at its minimum. We also speculate about a possibility of embedding our model in eight dimensions into a modified eight-dimensional supergavity that, in its turn, arises from a modified eleven-dimensional supergravity.

Original languageEnglish
Article number123530
JournalPhysical Review D
Volume96
Issue number12
DOIs
Publication statusPublished - 15 Dec 2017

Fingerprint

scalars
gravitation
supergravity
embedding
universe

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Inflation from higher dimensions. / Nakada, Hiroshi; Ketov, Sergei V.

In: Physical Review D, Vol. 96, No. 12, 123530, 15.12.2017.

Research output: Contribution to journalArticle

Nakada, Hiroshi ; Ketov, Sergei V. / Inflation from higher dimensions. In: Physical Review D. 2017 ; Vol. 96, No. 12.
@article{44c4a97707c54abb8d8e7bd2f430709b,
title = "Inflation from higher dimensions",
abstract = "We derive the scalar potential in four spacetime dimensions from an eight-dimensional (R+γR4-2Λ-F42) gravity model in the presence of the 4-form F4, with the (modified gravity) coupling constant γ and the cosmological constant Λ, by using the flux compactification of four extra dimensions on a 4-sphere with the warp factor. The scalar potential depends upon two scalar fields: the scalaron and the 4-sphere volume modulus. We demonstrate that it gives rise to a viable description of cosmological inflation in the early universe, with the scalaron playing the role of inflaton and the volume modulus to be (almost) stabilized at its minimum. We also speculate about a possibility of embedding our model in eight dimensions into a modified eight-dimensional supergavity that, in its turn, arises from a modified eleven-dimensional supergravity.",
author = "Hiroshi Nakada and Ketov, {Sergei V.}",
year = "2017",
month = "12",
day = "15",
doi = "10.1103/PhysRevD.96.123530",
language = "English",
volume = "96",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "12",

}

TY - JOUR

T1 - Inflation from higher dimensions

AU - Nakada, Hiroshi

AU - Ketov, Sergei V.

PY - 2017/12/15

Y1 - 2017/12/15

N2 - We derive the scalar potential in four spacetime dimensions from an eight-dimensional (R+γR4-2Λ-F42) gravity model in the presence of the 4-form F4, with the (modified gravity) coupling constant γ and the cosmological constant Λ, by using the flux compactification of four extra dimensions on a 4-sphere with the warp factor. The scalar potential depends upon two scalar fields: the scalaron and the 4-sphere volume modulus. We demonstrate that it gives rise to a viable description of cosmological inflation in the early universe, with the scalaron playing the role of inflaton and the volume modulus to be (almost) stabilized at its minimum. We also speculate about a possibility of embedding our model in eight dimensions into a modified eight-dimensional supergavity that, in its turn, arises from a modified eleven-dimensional supergravity.

AB - We derive the scalar potential in four spacetime dimensions from an eight-dimensional (R+γR4-2Λ-F42) gravity model in the presence of the 4-form F4, with the (modified gravity) coupling constant γ and the cosmological constant Λ, by using the flux compactification of four extra dimensions on a 4-sphere with the warp factor. The scalar potential depends upon two scalar fields: the scalaron and the 4-sphere volume modulus. We demonstrate that it gives rise to a viable description of cosmological inflation in the early universe, with the scalaron playing the role of inflaton and the volume modulus to be (almost) stabilized at its minimum. We also speculate about a possibility of embedding our model in eight dimensions into a modified eight-dimensional supergavity that, in its turn, arises from a modified eleven-dimensional supergravity.

UR - http://www.scopus.com/inward/record.url?scp=85040200165&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040200165&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.96.123530

DO - 10.1103/PhysRevD.96.123530

M3 - Article

VL - 96

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 12

M1 - 123530

ER -