Gravitational waves: A probe to the physics in the early universe

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	Gravitational waves: A probe to the physics in the early universe
	Huang, QG
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS A
	2015
卷号	30 期号:28-29 页码:1545005
关键词	Primordial gravitational waves inflation tensor-to-scalar ratio spectral index
通讯作者	Huang, QG (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	Gravitational waves can escape from the big bang and can be taken as a probe to the physics, in particular the inflation, in the early universe. Planck scale is a fundamental scale for quantum theory of gravity. Requiring the excursion distance of inflaton in the field space during inflation yields an upper bound on the tensor-to-scalar ratio. For example, r < 7 x 10(-4) for n(s) = 0.9645. In the typical inflationary scenario, we predict 1 -2/N < n(s) < 1 and -2/N-2 < alpha(s) < 0 which are consistent with Planck data released in 2015 quite well. Subtracting the contribution of thermal dust measured by Planck, BICEP2 data implies r less than or similar to 0.08 which is the tightest bound on the tensor-to-scalar ratio from current experiments.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
关键词[WOS]	INFLATIONARY UNIVERSE ; BICEP2 DATA ; SPECTRUM ; FLATNESS ; HORIZON ; PLANCK ; MODELS ; LEARN
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20821]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Huang, QG. Gravitational waves: A probe to the physics in the early universe[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2015,30(28-29):1545005.
APA	Huang, QG.(2015).Gravitational waves: A probe to the physics in the early universe.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,30(28-29),1545005.
MLA	Huang, QG."Gravitational waves: A probe to the physics in the early universe".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 30.28-29(2015):1545005.