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题名: HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH
作者: Huang, ZP ;  Wu, YL
刊名: INTERNATIONAL JOURNAL OF MODERN PHYSICS A
出版日期: 2012
卷号: 27, 期号:16
关键词: COSMOLOGICAL CONSTANT ;  UNIVERSE ;  SUPERNOVAE
学科分类: Physics
通讯作者: Huang, ZP (reprint author), Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China.
部门归属: [Huang, Zhuo-Peng] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China; [Huang, Zhuo-Peng; Wu, Yue-Liang] Chinese Acad Sci, Inst Theoret Phys, KITPC, SKLTP, Beijing 100190, Peoples R China
英文摘要: A holographic dark energy model characterized by the conformal-age-like length scale L = 1/a(4)(t) integral(t)(O) dt' a(3)(t') is motivated from the four-dimensional space-time volume at cosmic time t in the flat Friedmann-Robertson-Walker (FRW) universe. It is shown that when the background constituent with constant equation of state w(m) dominates the universe in the early time, the fractional energy density of the dark energy scales as Omega(de) similar or equal to 9/4 (3 + w(m))(2) d(2)a(2) with the equation of state given by w(de) similar or equal to -2/3 + w(m). The value of w(m) is taken to be w(m) similar or equal to -1 during inflation, w(m) = 1/3 in radiation-dominated epoch and w(m) = 0 in matter-dominated epoch, respectively. When the model parameter d takes the normal value at order one, the fractional density of dark energy is naturally negligible in the early universe, Omega(de) << 1 at a << 1. With such an analytic feature, the model can be regarded as a single-parameter model like the ACDM model, so that the present fractional energy density Omega(de)(a = 1) can solely be determined by solving the differential equation of Omega(de) once d is given. We further extend the model to the general case in which both matter and radiation are present. The scenario involving possible interaction between the dark energy and the background constituent is also discussed.
资助者: National Basic Research Program of China (973 Program) [2010CB833000]; National Nature Science Foundation of China (NSFC) [10975170, 10975184, 10947016]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000305288300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15075
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Huang, ZP,Wu, YL. HOLOGRAPHIC DARK ENERGY MODEL CHARACTERIZED BY THE CONFORMAL-AGE-LIKE LENGTH[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2012,27(16).
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