2013年5月
Nonlinear stability of cosmological solutions in massive gravity
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
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- 巻
- 号
- 5
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/1475-7516/2013/05/035
- 出版者・発行元
- IOP PUBLISHING LTD
We investigate nonlinear stability of two classes of cosmological solutions in massive gravity: isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) solutions and anisotropic FLRW solutions. For this purpose we construct the linear cosmological perturbation theory around axisymmetric Bianchi type-I backgrounds. We then expand the background around the two classes of solutions, which are fixed points of the background evolution equation, and analyze linear perturbations on top of it. This provides a consistent truncation of nonlinear perturbations around these fixed point solutions and allows us to analyze nonlinear stability in a simple way. In particular, it is shown that isotropic FLRW solutions exhibit nonlinear ghost instability. On the other hand, anisotropic FLRW solutions are shown to be ghost-free for a range of parameters and initial conditions.
- リンク情報
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- DOI
- https://doi.org/10.1088/1475-7516/2013/05/035
- arXiv
- http://arxiv.org/abs/arXiv:1303.4154
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000320161400037&DestApp=WOS_CPL
- URL
- http://arxiv.org/abs/1303.4154v2
- ID情報
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- DOI : 10.1088/1475-7516/2013/05/035
- ISSN : 1475-7516
- arXiv ID : arXiv:1303.4154
- Web of Science ID : WOS:000320161400037