Comment on “Gauss-Bonnet inflation” - INSPIRE

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Comment on “Gauss-Bonnet inflation”

Getbogi Hikmawan
(
- Kobe U. and
- Bandung Inst. Tech.
)
,
Jiro Soda
(
- Kobe U.
)
,
Agus Suroso
(
- Bandung Inst. Tech.
)
,
Freddy P. Zen
(
- Bandung Inst. Tech.
)

Dec 1, 2015

5 pages

Published in:

Phys.Rev.D 93 (2016) 6, 068301

Published: Mar 18, 2016

e-Print:

1512.00222 [hep-th]

DOI:

10.1103/PhysRevD.93.068301

View in:

reference search67 citations

Citations per year

Abstract: (APS)

Recently, an interesting inflationary scenario, named Gauss-Bonnet inflation, was proposed by Kanti et al. [Phys. Rev. D 92, 041302 (2015); Phys. Rev. D 92, 083524 (2015)]. In the model, there is no inflaton potential, but the inflaton couples to the Guass-Bonnet term. In the case of quadratic coupling, they find inflation occurs with a graceful exit. The scenario is attractive because of the natural setup. However, we show there exists a gradient instability in the tensor perturbations in this inflationary model. We further prove the no-go theorem for Gauss-Bonnet inflation without an inflaton potential.

Note:

6 pages, 3 figures

98.80.Cq
04.50.Kd
inflation: model
Gauss-Bonnet term
inflaton: potential
perturbation: tensor
stability
gradient

References(27)

Figures(3)

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(
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)
,
Radouane Gannouji
(
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)
,
Naresh Dadhich
(
- Jamia Millia Islamia and
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)

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•
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•
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)
,
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)
,
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(
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)

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(
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(
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)

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)
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(
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)

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(
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)
,
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(
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)
,
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(
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)

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•
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[15]

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Tsutomu Kobayashi
(
- Kyoto U.
)
,
Masahide Yamaguchi
(
- Tokyo Inst. Tech.
)
,
Jun'ichi Yokoyama
(
- Tokyo U., RESCEU and
- Tokyo U., IPMU
)

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•
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•

P.A.R. Ade
(
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)

et al.

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•
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[17]

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Ishwaree P. Neupane
(
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)

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[17]

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Masaki Satoh
(
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)
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Jiro Soda
(
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)

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Zong-Kuan Guo
(
- Bielefeld U.
)
,
Dominik J. Schwarz
(
- Bielefeld U.
)

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Masaki Satoh
(
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)

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•
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•
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(
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)
,
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(
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- Sogang U.
)
,
Wonwoo Lee
(
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)
,
Gansukh Tumurtushaa
(
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)

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Antonio De Felice
(
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)
,
Shinji Tsujikawa
(
- Tokyo U. of Sci.
)
,
Joseph Elliston
(
- Queen Mary, U. of London
)
,
Reza Tavakol
(
- Queen Mary, U. of London
)

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•
e-Print:
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•
DOI:
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