Is the NANOGrav signal a hint of dS decay during inflation?
文献类型：期刊论文
| 作者 | Li, Hao-Hao; Ye, Gen; Piao, Yun-Song |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2021 |
| 卷号 | 816页码:136211 |
| ISSN号 | 0370-2693 |
| 关键词 | GRAVITATIONAL-RADIATION VACUUM WAVES PROBE |
| DOI | 10.1016/j.physletb.2021.136211 |
| 英文摘要 | The NANOGrav collaboration recently has reported evidence for a stochastic common-spectrum process in its 12.5 yr dataset. We show that such a signal might be a hint of de Sitter (dS) decay during inflation. As suggested by the swampland conjectures, dS space is highly unstable if it exists at all. During inflation, the short-lived dS states will decay through a cascade of first-order phase transitions (PT). We find that the gravitational waves (GWs) yielded by such a PT will be "reddened" by subsequent dS expansion, which may result in a slightly red-tilt stochastic GW background at the low-frequency band, compatible with the NANOGrav 12.5 yr result. (C) 2021 The Author(s). Published by Elsevier B.V. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27368]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.[Li, Hao-Hao 2.Ye, Gen 3.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China 5.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 6.Internat Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hao-Hao,Ye, Gen,Piao, Yun-Song. Is the NANOGrav signal a hint of dS decay during inflation?[J]. PHYSICS LETTERS B,2021,816:136211. |
| APA | Li, Hao-Hao,Ye, Gen,&Piao, Yun-Song.(2021).Is the NANOGrav signal a hint of dS decay during inflation?.PHYSICS LETTERS B,816,136211. |
| MLA | Li, Hao-Hao,et al."Is the NANOGrav signal a hint of dS decay during inflation?".PHYSICS LETTERS B 816(2021):136211. |
入库方式： OAI收割
来源：理论物理研究所
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