半全息模型再探
Semi-holographic model revisited
摘要:
在最近的工作张,李和Noh [物理。B { \bf 694},177(2010)]提出了一个暗能量的模型,假设这个成分严格遵守全息原理。他们进行了动力系统分析,找到了一个有助于解决重合问题的尺度解。然而,他们需要明确的宇宙学常数。在本文中,我们推导出一个明确的解析解,没有$Λ$,这表明与超新星数据的协议。然而,这种解决方案是不物理的,因为违反了所有的能量条件。
英文摘要:
In a recent work Zhang, Li and Noh [Phys. Lett. B {\bf 694}, 177 (2010)]proposed a model for dark energy assuming this component strictly obeys the holographic principle. They performed a dynamical system analysis, finding a scaling solution which is helpful to solve the coincidence problem. However they need explicitly a cosmological constant. In this paper we derive an explicit analytical solution, without $Λ$, that shows agreement with the Supernovae data. However this solution is not physical because violate all the energy conditions.
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