arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1005.2180hep-thastro-ph.COgr-qc
收藏

用类似里奇的全息暗能量跨越幻影鸿沟

Crossing the phantom divide with Ricci-like holographic dark energy

Samuel Lepe, Francisco Pena

摘要:

我们研究了最近文献中所考虑的暗能量的全息模型,该模型假定能量密度为$ρ\sim R$,其中$R$是Ricci标量曲率。我们得到了一个宇宙学的情况下,来自考虑两个非相互作用的流体沿着一个合理的宇宙符合参数的Ancillary。我们根据观测数据调整了模型中的相关参数,并证明了暗能量的状态方程经历了一个穿越-1势垒的过程。此外,我们发现在这些参数方面的一个标量场理论的方法的分歧。

英文摘要:

We study a holographic model for the dark energy considered recently in the literature which postulates an energy density $ρ\sim R$, where $R$ is the Ricci scalar curvature. We obtain a cosmological scenario that comes from considering two non-interacting fluids along a reasonable Ansatz for the cosmic coincidence parameter. We adjust the involved parameters in the model according to the observational data and we show that the equation of state for the dark energy experience a cross through the -1 barrier. In addition, we find a disagreement in these parameters with respect to an approach from a scalar field theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑