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ファイル | 記述 | サイズ | フォーマット | |
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j.physletb.2015.11.050.pdf | 238.16 kB | Adobe PDF | 見る/開く |
タイトル: | Minimal theory of massive gravity |
著者: | De Felice, Antonio Mukohyama, Shinji |
キーワード: | Nuclear and High Energy Physics |
発行日: | 2016 |
出版者: | Elsevier B.V. |
誌名: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
巻: | 752 |
開始ページ: | 302 |
終了ページ: | 305 |
抄録: | We propose a new theory of massive gravity with only two propagating degrees of freedom. While the homogeneous and isotropic background cosmology and the tensor linear perturbations around it are described by exactly the same equations as those in the de Rham-Gabadadze-Tolley (dRGT) massive gravity, the scalar and vector gravitational degrees of freedom are absent in the new theory at the fully nonlinear level. Hence the new theory provides a stable nonlinear completion of the self-accelerating cosmological solution that was originally found in the dRGT theory. The cosmological solution in the other branch, often called the normal branch, is also rendered stable in the new theory and, for the first time, makes it possible to realize an effective equation-of-state parameter different from (either larger or smaller than) -1 without introducing any extra degrees of freedom. |
著作権等: | ©2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. |
URI: | http://hdl.handle.net/2433/210263 |
DOI(出版社版): | 10.1016/j.physletb.2015.11.050 |
関連リンク: | http://www.sciencedirect.com/science/article/pii/S0370269315009065 |
出現コレクション: | 学術雑誌掲載論文等 |
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