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G-inflation: inflation driven by the Galileon field · Around

2010

G-inflation: inflation driven by the Galileon field

Kobayashi, Tsutomu, Yamaguchi, Masahide, Yokoyama, Jun'ichi

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We propose a new class of inflation model, G-inflation, which has a Galileon-like nonlinear derivative interaction of the form $G(\phi, (\nabla\phi)^2)\Box\phi$ in the Lagrangian with the resultant equations of motion being of second order.

It is shown that (almost) scale-invariant curvature fluctuations can be generated even in the exactly de Sitter background and that the tensor-to-scalar ratio can take a significantly larger value than in the standard inflation models, violating the standard consistency relation.
Furthermore, violation of the null energy condition can occur without any instabilities.
As a result, the spectral index of tensor modes can be blue, which makes it easier to observe quantum gravitational waves from inflation by the planned gravitational-wave experiments such as LISA and DECIGO as well as by the upcoming CMB experiments such as Planck and CMBpol.

Built on

A. A. Starobinsky, JETP Lett. 30
1981
Earlier work this paper cites.
M. Fukugita and T. Yanagida, Phys. Lett. B 174
1986
Earlier work this paper cites.
L. H. Ford, Phys. Rev. D 35
1987
Earlier work this paper cites.
C. Armendariz-Picon, T. Damour and V. F. Mukhanov, Phys. Lett. B 458
1999
Earlier work this paper cites.
J. Garriga and V. F. Mukhanov, Phys. Lett. B 458
1999
Earlier work this paper cites.
N. Arkani-Hamed, H. C. Cheng, M. A. Luty and S. Mukohyama, JHEP 0405
2004
Earlier work this paper cites.

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D. Larson et al
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Cited in the paper.
C. Deffayet, O. Pujolas, I. Sawicki and A. Vikman, arXiv:1008.0048 [hep-th]
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Cited in the paper.
[Planck Collaboration], arXiv:astro-ph/0604069
Cited in the paper.
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Cited in the paper.

Then

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2008
Later among the works it cites.
A. D. Linde, Phys. Lett. B 129
2008
Later among the works it cites.
A. Nicolis, R. Rattazzi and E. Trincherini, Phys. Rev. D 79
2009
Later among the works it cites.
C. Deffayet, G. Esposito-Farese and A. Vikman, Phys. Rev. D 79
2009
Later among the works it cites.
N. Chow and J. Khoury, Phys. Rev. D 80
Original
2010
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