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Dynamics of holographic vacuum energy in the DGP model
Wu, Xing; Cai, Rong-Gen; Zhu, Zong-Hong; Zhu, ZH , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2008
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号77期号:4页码:-
摘要We consider the evolution of the vacuum energy in the Dvali-Gabadadze-Porrati (DGP) model according to the holographic principle under the assumption that the relation linking the IR and UV cutoffs still holds in this scenario. The model is studied when the IR cutoff is chosen to be the Hubble scale H(-1), the particle horizon R(ph), and the future event horizon R(eh), respectively. The two branches of the DGP model are also taken into account. Through numerical analysis, we find that in the cases of H(-1) in the (+) branch and R(eh) in both branches, the vacuum energy can play the role of dark energy. Moreover, when considering the combination of the vacuum energy and the 5D gravity effect in both branches, the equation of state of the effective dark energy may cross -1, which may lead to the big rip singularity. Besides, we constrain the model with the Type Ia supernovae and baryon oscillation data and find that our model is consistent with current data within 1 sigma, and that the observations prefer either a pure holographic dark energy or a pure DGP model.
部门归属[Wu, X; Zhu, ZH] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; [Cai, RG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Digital Sky Survey Probe Wmap Observations Dark Energy Cosmological Constant Ia Supernovae Data Release Accelerating Universe Constraints Galaxies Gravity
学科领域Physics
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收录类别SCI
WOS记录号WOS:000253764800017
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被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5584
专题理论物理所1978-2010年知识产出
通讯作者Zhu, ZH , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
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Wu, Xing,Cai, Rong-Gen,Zhu, Zong-Hong,et al. Dynamics of holographic vacuum energy in the DGP model[J]. PHYSICAL REVIEW D,2008,77(4):-.
APA Wu, Xing,Cai, Rong-Gen,Zhu, Zong-Hong,&Zhu, ZH , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.(2008).Dynamics of holographic vacuum energy in the DGP model.PHYSICAL REVIEW D,77(4),-.
MLA Wu, Xing,et al."Dynamics of holographic vacuum energy in the DGP model".PHYSICAL REVIEW D 77.4(2008):-.
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