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1475-7516_2013_02_029.pdf | 226.17 kB | Adobe PDF | 見る/開く |
タイトル: | Hawking-Moss instanton in nonlinear massive gravity |
著者: | Zhang, Ying-li Saito, Ryo Sasaki, Misao |
著者名の別形: | 章, 穎理 |
キーワード: | quantum cosmology modified gravity cosmological phase transitions physics of the early universe |
発行日: | 1-Feb-2013 |
出版者: | IOP Publishing |
誌名: | Journal of Cosmology and Astroparticle Physics |
巻: | 2013 |
号: | 02 |
論文番号: | 029 |
抄録: | As a first step toward understanding a lanscape of vacua in a theory of non-linear massive gravity, we consider a landscape of a single scalar field and study tunneling between a pair of adjacent vacua. We study the Hawking-Moss (HM) instanton that sits at a local maximum of the potential, and evaluate the dependence of the tunneling rate on the parameters of the theory. It is found that provided with the same physical HM Hubble parameter H[HM], depending on the values of parameters α[3] and α[4] in the action (2.2), the corresponding tunneling rate can be either enhanced or suppressed when compared to the one in the context of General Relativity (GR). Furthermore, we find the constraint on the ratio of the physical Hubble parameter to the fiducial one, which constrains the form of potential. This result is in sharp contrast to GR where there is no bound on the minimum value of the potential. |
著作権等: | © 2013 IOP Publishing Ltd and Sissa Medialab srl この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/173708 |
DOI(出版社版): | 10.1088/1475-7516/2013/02/029 |
出現コレクション: | 学術雑誌掲載論文等 |
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