Built on

J. Gleyzes, D. Langlois, F. Piazza and F. Vernizzi, JCAP 1502
Original
1952
Earlier work this paper cites.
R. L. Arnowitt, S. Deser and C. W. Misner, Phys. Rev. 117
1960
Earlier work this paper cites.
C. Deffayet, G. Esposito-Farese and A. Vikman, Phys. Rev. D 79
Original
1967
Earlier work this paper cites.
A. I. Vainshtein, Phys. Lett. B 39
1972
Earlier work this paper cites.
G. W. Horndeski, Int. J. Theor. Phys. 10, 363-384 (1974)
1974
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A. A. Starobinsky, Phys. Lett. B 91
1980
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J. M. Bardeen, Phys. Rev. D 22
1980
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R. Kase and S. Tsujikawa, Int. J. Mod. Phys. D 23
Original
1984
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1987
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B. Ratra and P. J. E. Peebles, Phys. Rev. D 37
1988
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E. J. Copeland, A. R. Liddle and D. Wands, Phys. Rev. D 57
1998
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P. G. Ferreira and M. Joyce, Phys. Rev. D 58
1998
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A. G. Riess et al
1999
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C. Deffayet, X. Gao, D. A. Steer and G. Zahariade, Phys. Rev. D 84
Original
2000
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T. Barreiro, E. J. Copeland and N. J. Nunes, Phys. Rev. D 61
2000
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R. Bean, S. H. Hansen and A. Melchiorri, Phys. Rev. D 64
2001
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D. N. Spergel et al
2003
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S. Capozziello, Int. J. Mod. Phys. D 11
2004
Earlier work this paper cites.

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Then

A. De Felice, T. Kobayashi and S. Tsujikawa, Phys. Lett. B 706
Original
2012
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Original
2012
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G. B. Zhao, T. Giannantonio, L. Pogosian, A. Silvestri, D. J. Bacon, K. Koyama, R. C. Nichol and Y. S. Song, Phys. Rev. D 81
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2015

Observational signatures of the theories beyond Horndeski

De Felice, Antonio, Koyama, Kazuya, Tsujikawa, Shinji

Understand

In the approach of the effective field theory of modified gravity, we derive the equations of motion for linear perturbations in the presence of a barotropic perfect fluid on the flat isotropic cosmological background.

In a simple version of Gleyzes-Langlois-Piazza-Vernizzi (GLPV) theories, which is the minimum extension of Horndeski theories, we show that a slight deviation of the tensor propagation speed squared $c_{\rm t}^2$ from 1 generally leads to the large modification to the propagation speed squared $c_{\rm s}^2$ of a scalar degree of freedom $\phi$.
This problem persists whenever the kinetic energy $\rho_X$ of the field $\phi$ is much smaller than the background energy density $\rho_m$, which is the case for most of dark energy models in the asymptotic past.
Since the scaling solution characterized by the constant ratio $\rho_X/\rho_m$ is one way out for avoiding such a problem, we study the evolution of perturbations for a scaling dark energy model in the framework of GLPV theories in the Jordan frame.

Built on

J. Gleyzes, D. Langlois, F. Piazza and F. Vernizzi, JCAP 1502
Original
1952
Earlier work this paper cites.
R. L. Arnowitt, S. Deser and C. W. Misner, Phys. Rev. 117
1960
Earlier work this paper cites.
C. Deffayet, G. Esposito-Farese and A. Vikman, Phys. Rev. D 79
Original
1967
Earlier work this paper cites.
A. I. Vainshtein, Phys. Lett. B 39
1972
Earlier work this paper cites.
G. W. Horndeski, Int. J. Theor. Phys. 10, 363-384 (1974)
1974
Earlier work this paper cites.
A. A. Starobinsky, Phys. Lett. B 91
1980
Earlier work this paper cites.
J. M. Bardeen, Phys. Rev. D 22
1980
Earlier work this paper cites.
R. Kase and S. Tsujikawa, Int. J. Mod. Phys. D 23
Original
1984
Earlier work this paper cites.
N. Kaiser, Mon. Not. Roy. Astron. Soc. 227
1987
Earlier work this paper cites.
B. Ratra and P. J. E. Peebles, Phys. Rev. D 37
1988
Earlier work this paper cites.
Y. Fujii, Phys. Rev. D 26
1998
Earlier work this paper cites.
E. J. Copeland, A. R. Liddle and D. Wands, Phys. Rev. D 57
1998
Earlier work this paper cites.
P. G. Ferreira and M. Joyce, Phys. Rev. D 58
1998
Earlier work this paper cites.
A. G. Riess et al
1999
Earlier work this paper cites.
C. Deffayet, X. Gao, D. A. Steer and G. Zahariade, Phys. Rev. D 84
Original
2000
Earlier work this paper cites.
T. Barreiro, E. J. Copeland and N. J. Nunes, Phys. Rev. D 61
2000
Earlier work this paper cites.
R. Bean, S. H. Hansen and A. Melchiorri, Phys. Rev. D 64
2001
Earlier work this paper cites.
D. N. Spergel et al
2003
Earlier work this paper cites.
S. Capozziello, Int. J. Mod. Phys. D 11
2004
Earlier work this paper cites.

Similar

J. Khoury and A. Weltman, Phys. Rev. Lett. 93
2004
Cited alongside, same era.
R. J. Scherrer, Phys. Rev. Lett. 93
2004
Cited alongside, same era.
M. Tegmark et al
2004
Cited alongside, same era.
D. J. Eisenstein et al
2005
Cited alongside, same era.
D. Giannakis and W. Hu, Phys. Rev. D 72
2005
Cited alongside, same era.
W. Hu and I. Sawicki, Phys. Rev. D 76
Original
2008
Cited alongside, same era.
C. Cheung, P. Creminelli, A. L. Fitzpatrick, J. Kaplan and L. Senatore, JHEP 0803
Original