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JHEP04(2015)016.pdf | 497.89 kB | Adobe PDF | 見る/開く |
タイトル: | Homogeneous instantons in bigravity |
著者: | Zhang, Ying-li Sasaki, Misao Yeom, Dong-han |
著者名の別形: | 佐々木, 節 |
キーワード: | Solitons Monopoles and Instantons Models of Quantum Gravity |
発行日: | 7-Apr-2015 |
出版者: | Springer Berlin Heidelberg |
誌名: | Journal of High Energy Physics |
巻: | 2015 |
号: | 4 |
論文番号: | 16 |
抄録: | We study homogeneous gravitational instantons, conventionally called the Hawking-Moss (HM) instantons, in bigravity theory. The HM instantons describe the amplitude of quantum tunneling from a false vacuum to the true vacuum. Corrections to General Relativity (GR) are found in a closed form. Using the result, we discuss the following two issues: reduction to the de Rham-Gabadadze-Tolley (dRGT) massive gravity and the possibility of preference for a large e-folding number in the context of the Hartle-Hawking (HH) no-boundary proposal. In particular, concerning the dRGT limit, it is found that the tunneling through the so-called self-accelerating branch is exponentially suppressed relative to the normal branch, and the probability becomes zero in the dRGT limit. As far as HM instantons are concerned, this could imply that the reduction from bigravity to the dRGT massive gravity is ill-defined. |
記述: | Article funded by SCOAP3. |
著作権等: | The final publication is available under Open Access at Springer via http://dx.doi.org/10.1007/JHEP04(2015)016. |
URI: | http://hdl.handle.net/2433/198601 |
DOI(出版社版): | 10.1007/JHEP04(2015)016 |
出現コレクション: | 学術雑誌掲載論文等 |
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