Knowledge Management System of Institute of Theoretical Physics, CAS
Liu, Jing; Guo, Zong-Kuan ; Cai, Rong-Gen
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| Analytical approximation of the scalar spectrum in the ultraslow-roll inflationary models | |
| Source Publication | PHYSICAL REVIEW D
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| Language | 英语 |
| Keyword | CONSTRAINTS |
| Abstract | The ultraslow-roll (USR) inflationary models predict large-amplitude scalar perturbations at small scales which can lead to the primordial black hole production and scalar-induced gravitational waves. In general, scalar perturbations in the USR models can only be obtained using a numerical method because the usual slow-roll approximation breaks. In this work, we propose an analytical approach to estimate the scalar spectrum which is consistent with the numerical result. We find that the USR inflationary models predict a peak with power-law slopes in the scalar spectrum and energy spectrum of gravitational waves, and we derive the expression of the spectral indexes in terms of the inflationary potential. In turn, the inflationary potential near the USR regime can be reconstructed from the negative spectral index of the gravitational wave energy spectrum. |
| 2020 | |
| ISSN | 2470-0010 |
| Volume | 101Issue:8Pages:83535 |
| Cooperation Status | 国内 |
| Subject Area | Astronomy & Astrophysics ; Physics |
| MOST Discipline Catalogue | Astronomy & Astrophysics ; Physics, Particles & Fields |
| DOI | 10.1103/PhysRevD.101.083535 |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/26938 |
| Collection | SCI期刊论文 |
| Affiliation | 1.[Liu, Jing 2.Guo, Zong-Kuan 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 5.[Guo, Zong-Kuan 6.Univ Chinese Acad Sci, Sch Fundamental Phys & Math Sci, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Jing,Guo, Zong-Kuan,Cai, Rong-Gen. Analytical approximation of the scalar spectrum in the ultraslow-roll inflationary models[J]. PHYSICAL REVIEW D,2020,101(8):83535. |
| APA | Liu, Jing,Guo, Zong-Kuan,&Cai, Rong-Gen.(2020).Analytical approximation of the scalar spectrum in the ultraslow-roll inflationary models.PHYSICAL REVIEW D,101(8),83535. |
| MLA | Liu, Jing,et al."Analytical approximation of the scalar spectrum in the ultraslow-roll inflationary models".PHYSICAL REVIEW D 101.8(2020):83535. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Analytical approxima（345KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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