Thermal fluctuations and bouncing cosmologies
Cai YF(蔡一夫); Cai, YF; Xue, W; Brandenberger, R; Zhang, XM
刊名JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2009
期号6页码:37
关键词physics of the early universe cosmological perturbation theory alternatives to inflation transplanckian physics
学科分类Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2009/06/037
通讯作者[Cai, Yi-Fu ; Brandenberger, Robert ; Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Xue, Wei ; Brandenberger, Robert] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada ; [Brandenberger, Robert ; Zhang, Xinmin] CAS, TPCSF, Beijing 100049, Peoples R China ; [Brandenberger, Robert] CAS, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China
文章类型Article
英文摘要We study the conditions under which thermal fluctuations generated in the contracting phase of a non-singular bouncing cosmology can lead to a scale-invariant spectrum of cosmological fluctuations at late times in the expanding phase. We consider point particle gases, holographic gases and string gases. In the models thus identified, we also study the thermal non-Gaussianities of the resulting distribution of inhomogeneities. For regular point particle radiation, we find that the background must have an equation of state w = 7/3 in order to obtain a scale-invariant spectrum, and that the non-Gaussianities are suppressed on scales larger than the thermal wavelength. For Gibbons-Hawking radiation, we find that a matter-dominated background yields scale- invariance, and that the non-Gaussianities are large. String gases are also briefly considered.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000267776100001
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240373
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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Cai YF,Cai, YF,Xue, W,et al. Thermal fluctuations and bouncing cosmologies[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2009(6):37.
APA 蔡一夫,Cai, YF,Xue, W,Brandenberger, R,&Zhang, XM.(2009).Thermal fluctuations and bouncing cosmologies.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),37.
MLA 蔡一夫,et al."Thermal fluctuations and bouncing cosmologies".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2009):37.
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