ITP OpenIR  > SCI期刊论文
Li, Hao-Hao; Ye, Gen; Piao, Yun-Song
Is the NANOGrav signal a hint of dS decay during inflation?
Source PublicationPHYSICS LETTERS B
Language英语
KeywordGRAVITATIONAL-RADIATION VACUUM WAVES PROBE
AbstractThe 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.
2021
ISSN0370-2693
Volume816Pages:136211
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
DOI10.1016/j.physletb.2021.136211
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27368
CollectionSCI期刊论文
Affiliation1.[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
Recommended Citation
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.
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