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Liu, Jing; Cai, Rong-Gen; Guo, Zong-Kuan
Large Anisotropies of the Stochastic Gravitational Wave Background from Cosmic Domain Walls
Source PublicationPHYSICAL REVIEW LETTERS
Language英语
KeywordRADIATION
AbstractWe investigate the stochastic gravitational wave background (SGWB) from cosmic domain walls (DWs) caused by quantum fluctuations of a light scalar field phi during inflation. Large-scale perturbations of phi lead to large-scale perturbations of DW energy density and anisotropies in the SGWB. We find that the angular power spectrum of this SGWB is scale invariant and at least of the order of 10(-2), which is a distinctive feature of observational interest. Since we have not detected primordial gravitational waves yet, anisotropies of the SGWB provide a nontrivial opportunity to verify the rationality of inflation and detect the energy scale of inflation, especially for low-scale inflationary models. Square kilometer array has the opportunity to detect the anisotropies of such SGWBs. The common-spectrum process observed recently by NANOGrav could also be interpreted by the SGWB from cosmic DWs.
2021
ISSN0031-9007
Volume126Issue:14Pages:141303
Cooperation Status国内
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
DOI10.1103/PhysRevLett.126.141303
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27376
CollectionSCI期刊论文
Affiliation1.[Liu, Jing
2.Cai, Rong-Gen
3.Univ Chinese Acad Sci, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
5.[Cai, Rong-Gen
6.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jing,Cai, Rong-Gen,Guo, Zong-Kuan. Large Anisotropies of the Stochastic Gravitational Wave Background from Cosmic Domain Walls[J]. PHYSICAL REVIEW LETTERS,2021,126(14):141303.
APA Liu, Jing,Cai, Rong-Gen,&Guo, Zong-Kuan.(2021).Large Anisotropies of the Stochastic Gravitational Wave Background from Cosmic Domain Walls.PHYSICAL REVIEW LETTERS,126(14),141303.
MLA Liu, Jing,et al."Large Anisotropies of the Stochastic Gravitational Wave Background from Cosmic Domain Walls".PHYSICAL REVIEW LETTERS 126.14(2021):141303.
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