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题名: Large number limit of multifield inflation
作者: Guo, ZK
刊名: PHYSICAL REVIEW D
出版日期: 2017
卷号: 96, 期号:12, 页码:123521
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.96.123521
通讯作者: Guo, ZK (reprint author), Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
合作性质: 国内
英文摘要: We compute the tensor and scalar spectral index n(t), n(s), the tensor-to-scalar ratio r, and the consistency relation n(t)/r in the general monomial multifield slow-roll inflation models with potentials V similar to Sigma(i)lambda(i)vertical bar phi(i)vertical bar(Pi). The general models give a novel relation that nt, ns and n(t)/r are all proportional to the logarithm of the number of fields N-f when N-f is getting extremely large with the order of magnitude around O(10(40)) thorn. An upper bound N-f less than or similar to N*e(ZN)* is given by requiring the slow variation parameter small enough where N-* is the e-folding number and Z is a function of distributions of lambda(i) and rho(i). Besides, n(t)/r differs from the single-field result - 1/8 with substantial probability except for a few very special cases. Finally, we derive theoretical boundsr r > 2/N-* (r greater than or similar to 0.03) and for nt, which can be tested by observation in the near future.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: FLUX COMPACTIFICATIONS
项目资助者: National Natural Science Foundation of China [11647601] ;  Weng Hongwu Academic Innovation Research Fund of Peking University
语种: 英语
WOS记录号: WOS:000418202300004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/22192
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Recommended Citation:
Guo, ZK. Large number limit of multifield inflation[J]. PHYSICAL REVIEW D,2017,96(12):123521.
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