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A new model of agegraphic dark energy
文献类型：期刊论文
| 作者 | Wei, Hao; Cai, Rong-Gen ; Wei, H , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
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| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2008 |
| 卷号 | 660期号:3页码:113-117 |
| 关键词 | Karolyhazy Uncertainty Relation Space-time |
| ISSN号 | 0370-2693 |
| 英文摘要 | In this note, we propose a new model of agegraphic dark energy based on the Karolyhazy relation, where the time scale is chosen to be the conformal time eta of the Friedmann-Robertson-Walker (FRW) universe. We find that in the radiation-dominated epoch, the equation-of-state parameter of the new agegraphic dark energy omega(q) = - 1/3 whereas Omega(q) = n(2)a(2); in the matter-dominated epoch, omega(q) = -2/3 whereas Omega(q) = n(2)a(2)/4; eventually, the new agegraphic dark energy dominates; in the late time omega(q) --> -1 when a --> infinity, and the new agegraphic dark energy mimics a cosmological constant. In every stage, all things are consistent. The confusion in the original agegraphic dark energy model proposed in [R.G. Cai, Phys. Lett. B 657 (2007) 228, arXiv: 0707.4049 [hep-th]] disappears in this new model. Furthermore, Omega(q) << 1 is naturally satisfied in both radiation-dominated and matter-dominated epochs where a << 1. In addition, we further extend the new agegraphic dark energy model by including the interaction between the new agegraphic dark energy and background matter. In this case, we find that Wq can cross the phantom divide. (C) 2008 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000253739800006 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5577]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Wei, H , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Hao,Cai, Rong-Gen,Wei, H , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. A new model of agegraphic dark energy[J]. PHYSICS LETTERS B,2008,660(3):113-117. |
| APA | Wei, Hao,Cai, Rong-Gen,&Wei, H , Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.(2008).A new model of agegraphic dark energy.PHYSICS LETTERS B,660(3),113-117. |
| MLA | Wei, Hao,et al."A new model of agegraphic dark energy".PHYSICS LETTERS B 660.3(2008):113-117. |
入库方式： OAI收割
来源：理论物理研究所
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