Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras

doi:10.1103/PhysRevD.105.023530

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Stasis in an expanding universe: A recipe for stable mixed-component cosmological eras
	Dienes, Keith R.; Heurtier, Lucien 3; Huang, Fei 4; Kim, Doojin 6; Tait, Tim M. P.; Thomas, Brooks 1
刊名	PHYSICAL REVIEW D
	2022
卷号	105 期号:2 页码:23530
关键词	ELECTROWEAK BARYOGENESIS DIMENSIONS MATTER
ISSN号	2470-0010
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
内容类型	期刊论文
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.