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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevD.103.024002.pdf | 244.82 kB | Adobe PDF | 見る/開く |
タイトル: | Covariant entropy bound beyond general relativity |
著者: | Matsuda, Taisuke Mukohyama, Shinji ![]() ![]() |
著者名の別形: | 松田, 泰亮 向山, 信治 |
キーワード: | Alternative gravity theories Classical black holes Gravitation Gravity in dimensions other than four Gravitation, Cosmology & Astrophysics |
発行日: | Jan-2021 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review D |
巻: | 103 |
号: | 2 |
論文番号: | 024002 |
抄録: | We propose a covariant entropy bound in gravitational theories beyond general relativity (GR), using Wald entropy or its extension instead of Bekenstein-Hawking entropy. We first extend the proof of the bound known in four-dimensional GR to D-dimensional GR, f(R) gravity, and canonical scalar-tensor theory. We then consider Einstein-Gauss-Bonnet (EGB) gravity as a more nontrivial example and, under a set of reasonable assumptions, prove the bound in the GR branch of spherically symmetric configurations. As a corollary, it is shown that under the null and dominant energy conditions, the generalized second law holds in the GR branch of spherically symmetric configurations of EGB gravity at the fully nonlinear level. |
著作権等: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. |
URI: | http://hdl.handle.net/2433/274752 |
DOI(出版社版): | 10.1103/physrevd.103.024002 |
出現コレクション: | 学術雑誌掲載論文等 |
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