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题名: Gravitational waves: A probe to the physics in the early universe
作者: Huang, QG
刊名: INTERNATIONAL JOURNAL OF MODERN PHYSICS A
出版日期: 2015
卷号: 30, 期号:28-29, 页码:1545005
关键词: Primordial gravitational waves ;  inflation ;  tensor-to-scalar ratio ;  spectral index
学科分类: Physics
DOI: http://dx.doi.org/10.1142/S0217751X15450050
通讯作者: Huang, QG (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Article
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.
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
项目资助者: NSFC [11322545, 11335012, 11575271]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20821
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
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.
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