Fetching the paper…

Reading the bibliography…

2010

Inevitable ghost and the degrees of freedom in f(R,G) gravity

De Felice, Antonio, Tanaka, Takahiro

Original
PDF
Post on X

Understand

The study of linear perturbation theory for general functions of the Ricci and Gauss-Bonnet scalars is done over an empty anisotropic universe, i.e.

the Kasner-type background, in order to show that an anisotropic background in general has ghost degrees of freedom, which are absent on Friedmann-Lemaitre-Robertson-Walker (FLRW) backgrounds.
The study of the scalar perturbation reveals that on this background the number of independent propagating degrees of freedom is four and reduces to three on FLRW backgrounds, as one mode becomes highly massive to decouple from the physical spectrum.
When this mode remains physical, there is inevitably a ghost mode.

Inevitable ghost and the degrees of freedom in f(R,G) gravity · Around

Built on

A. De Felice and T. Suyama, JCAP 0906
Original
1958
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
1992
Earlier work this paper cites.
J. O’ Hanlon, Phys. Rev. Lett. 29
2003
Earlier work this paper cites.

Similar

S. Capozziello, Int. J. Mod. Phys. D 11
2004
Cited alongside, same era.
S. M. Carroll, A. De Felice, V. Duvvuri, D. A. Easson, M. Trodden and M. S. Turner, Phys. Rev. D 71
2005
Cited alongside, same era.
S. Nojiri, S. D. Odintsov and M. Sasaki, Phys. Rev. D 71
Original
2006
Cited alongside, same era.
K. S. Stelle, Gen. Rel. Grav. 9
2006
Cited alongside, same era.
A. De Felice and S. Tsujikawa, arXiv:1002.4928 [gr-qc]
Original
Cited in the paper.

Then

L. Amendola, R. Gannouji, D. Polarski and S. Tsujikawa, Phys. Rev. D 75
Original
2008
Later among the works it cites.
S. M. Carroll, I. Sawicki, A. Silvestri and M. Trodden, New J. Phys. 8
2008
Later among the works it cites.
K. Bamba, S. D. Odintsov, L. Sebastiani and S. Zerbini, Eur. Phys. J. C 67
Original
2010
Closest in time.

Beyond the bibliography

alphaXiv searches the wider corpus for related work and actual follow-ups.

Open on alphaXiv

alphaXiv is searching for related work…