Large number limit of multifield inflation

doi:10.1103/PhysRevD.96.123521

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	Large number limit of multifield inflation
	Guo, ZK
刊名	PHYSICAL REVIEW D
	2017
卷号	96 期号:12 页码:123521
关键词	FLUX COMPACTIFICATIONS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.96.123521
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 Ne(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.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23401]
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.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Guo, ZK. Large number limit of multifield inflation[J]. PHYSICAL REVIEW D,2017,96(12):123521.
APA	Guo, ZK.(2017).Large number limit of multifield inflation.PHYSICAL REVIEW D,96(12),123521.
MLA	Guo, ZK."Large number limit of multifield inflation".PHYSICAL REVIEW D 96.12(2017):123521.