A new model of agegraphic dark energy
A new model of agegraphic dark energy
复制标题
年龄暗能量的新模型
DOI:
10.1016/j.physletb.2007.12.030
复制
发表时间:
2007-08
影响因子:
4.4
通讯作者:
Wei, Hao
中科院分区:
文献类型:
--
作者:
Cai, Rong-Gen;Wei, Hao
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 η 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 wq=-1/3 whereas Ωq= n2a2; in the matter-dominated epoch, wq=-2/3 whereas Ωq= n2a2/4; eventually, the new agegraphic dark energy dominates; in the late time wq→-1 when a→∞, 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 [RG Cai, Phys. Lett. B 657 (2007) 228, arXiv: 0707.4049 [hep-th]] disappears in this new model. Furthermore, Ωq<< 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
登录
查看更多内容
影响因子:
2.2
作者:
M. Maziashvili
通讯作者:
M. Maziashvili
影响因子:
4.4
作者:
Dvali, G;Gabadadze, G;Porrati, M
通讯作者:
Porrati, M
影响因子:
4.4
作者:
Li, M
通讯作者:
Li, M
DOI:
--
发表时间:
1986
期刊:
--
影响因子:
--
作者:
R. Penrose;C. Isham
通讯作者:
R. Penrose;C. Isham
影响因子:
6.4
作者:
Burin Gumjudpai;T. Naskar;M. Sami;S. Tsujikawa
通讯作者:
Burin Gumjudpai;T. Naskar;M. Sami;S. Tsujikawa