Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras
文献类型：期刊论文
| 作者 | Dienes, Keith R.; Heurtier, Lucien3; Huang, Fei4; Kim, Doojin6; Tait, Tim M. P.; Thomas, Brooks1 |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2022 |
| 卷号 | 105期号:2页码:23530 |
| ISSN号 | 2470-0010 |
| 关键词 | ELECTROWEAK BARYOGENESIS DIMENSIONS MATTER |
| DOI | 10.1103/PhysRevD.105.023530 |
| 英文摘要 | One signature of an expanding universe is the time variation of the cosmological abundances of its different components. For example, a radiation-dominated universe inevitably gives way to a matter-dominated universe, and critical moments such as matter-radiation equality are fleeting. In this paper, we point out that this lore is not always correct and that it is possible to obtain a form of stasis in which the relative cosmological abundances Omega(i) of the different components remain unchanged over extended cosmological epochs, even as the universe expands. Moreover, we demonstrate that such situations are not fine-tuned but are actually global attractors within certain cosmological frameworks, with the universe naturally evolving toward such long-lasting periods of stasis for a wide variety of initial conditions. The existence of this kind of stasis therefore gives rise to a host of new theoretical possibilities across the entire cosmological time-line, ranging from potential implications for primordial density perturbations, dark-matter production, and structure formation all the way to early reheating, early matter-dominated eras, and even the age of the Universe. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27866]  |
| 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.Texas A&M Univ, Dept Phys & Astron, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77843 USA 2.[Dienes, Keith R.] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA 3.Dienes, Keith R.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA 4.Univ Durham, IPPP, Durham DH1 3LE, England 5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 6.Huang, Fei; Tait, Tim M. P.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA 7.Lafayette Coll, Dept Phys, Easton, PA 18042 USA |
| 推荐引用方式 GB/T 7714 | Dienes, Keith R.,Heurtier, Lucien,Huang, Fei,et al. Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras[J]. PHYSICAL REVIEW D,2022,105(2):23530. |
| APA | Dienes, Keith R.,Heurtier, Lucien,Huang, Fei,Kim, Doojin,Tait, Tim M. P.,&Thomas, Brooks.(2022).Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras.PHYSICAL REVIEW D,105(2),23530. |
| MLA | Dienes, Keith R.,et al."Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras".PHYSICAL REVIEW D 105.2(2022):23530. |
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来源：理论物理研究所
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