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Cai, RG; Tuo, ZL; Wu, YB; Zhao, YY; Cai, RG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
More on QCD ghost dark energy
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordGalaxy Redshift Survey Digital Sky Survey Large-n-limit Cosmological Constant Current-algebra 2df-sdss Lrg Qso Survey Universe Vacuum Model
AbstractThe 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.
2012
ISSN1550-7998
Volume86Issue:2Pages:23511
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSFC [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] ; 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] ; 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] ; 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]
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Cited Times:75[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15059
CollectionSCI期刊论文
Corresponding AuthorCai, RG (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Cai, RG,Tuo, ZL,Wu, YB,et al. More on QCD ghost dark energy[J]. PHYSICAL REVIEW D,2012,86(2):23511.
APA Cai, RG,Tuo, ZL,Wu, YB,Zhao, YY,&Cai, RG .(2012).More on QCD ghost dark energy.PHYSICAL REVIEW D,86(2),23511.
MLA Cai, RG,et al."More on QCD ghost dark energy".PHYSICAL REVIEW D 86.2(2012):23511.
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