Thermal fluctuations and bouncing cosmologies
文献类型：期刊论文
| 作者 | Cai YF(蔡一夫) ; Cai, YF; Xue, W; Brandenberger, R; Zhang, XM
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2009 |
| 期号 | 6页码:37 |
| 关键词 | physics of the early universe cosmological perturbation theory alternatives to inflation transplanckian physics |
| 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 |
| 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000267776100001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240373]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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