Gong, YG , Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
部门归属:
[Gong, YG] Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China; [Gong, YG; Li, TJ] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Li, TJ] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Li, TJ] Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA
英文摘要:
We propose a modified holographic dark energy (MHDE) model with the Hubble scale as the infrared (IR) cutoff. Introducing the infinite extra dimension(s) at very large distance scale, we consider the black hole mass in higher dimensions as the ultraviolet cutoff. Thus, we can probe the effects of the IR infinite extra dimension(s). As a concrete example, we consider the Dvali-Gabadadze-Porrati (DGP) model and its generalization. We find that the DGP model is dual to the MHDE model in five dimensions, and the ACDM model is dual to the MHDE model in six dimensions. Fitting the MHDE model to the observational data, we obtain that Omega m0 = 0.269(-0.027)(+0.030), Omega k0 = 0.003-(+0.011)(0.012),and the number of the spatial dimensions is N = 4.78(-0.44)(+0.68). The best fit value of N implies that there might exist two IR infinite extra dimensions. (C) 2009 Elsevier B.V. All rights reserved.
Gong, Yungui,Li, Tianjun. A modified holographic dark energy model with infrared infinite extra dimension(s)[J]. PHYSICS LETTERS B,2010,683(41004):241-247.
