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题名: More on QCD ghost dark energy
作者: Cai, RG ;  Tuo, ZL ;  Wu, YB ;  Zhao, YY
刊名: PHYSICAL REVIEW D
出版日期: 2012
卷号: 86, 期号:2, 页码:23511
关键词: GALAXY REDSHIFT SURVEY ;  DIGITAL SKY SURVEY ;  LARGE-N-LIMIT ;  COSMOLOGICAL CONSTANT ;  CURRENT-ALGEBRA ;  2DF-SDSS LRG ;  QSO SURVEY ;  UNIVERSE ;  VACUUM ;  MODEL
学科分类: Physics
通讯作者: Cai, RG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
部门归属: [Cai, Rong-Gen; Tuo, Zhong-Liang] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Wu, Ya-Bo; Zhao, Yue-Yue] Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China
英文摘要: The difference between the vacuum energy of quantum fields in Minkowski space and in a Friedmann-Robertson-Walker universe might be related to the observed dark energy. The vacuum energy of the Veneziano ghost field introduced to solve the U(1)(A) problem in QCD is of the form H + O(H-2). Based on this, we study the dynamical evolution of a phenomenological dark energy model whose energy density is of the form alpha H + beta H-2. In this model, the universe approaches a de Sitter phase at late times. We fit the model with current observational data, including SnIa, BAO, CMB, BBN, the Hubble parameter, and the growth rate of matter perturbation. It shows that the universe begins to accelerate at redshift z similar to 0.75, and this model is consistent with current data. In particular, this model fits the data of the growth factor well as the Lambda CDM model.
资助者: NSFC [10821504, 10975168, 11035008, 11175077]; Ministry of Science and Technology of China [2010CB833004]; Chinese Academy of Sciences [KJCX2-EW-W01]; Natural Science Foundation of Liaoning province [20102124]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000306193200001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15059
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Cai, RG,Tuo, ZL,Wu, YB,et al. More on QCD ghost dark energy[J]. PHYSICAL REVIEW D,2012,86(2):23511.
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