A Tracker Solution for a Holographic Dark Energy Model

分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-27

Hui Li,b Zong-Kuan Guo Yuan-Zhong Zhang

摘要： We investigate a kind of holographic dark energy model with the future event horizon the IR cutoff and the equation of state −1. In this model, the constraint on the equation of state automatically specifies an interaction between matter and dark energy. With this interaction included, an accelerating expansion is obtained as well as the transition from deceleration to acceleration. It is found that there exists a stable tracker solution for the numerical parameter d > 1, and d smaller than one will not lead to a physical solution. This model provides another possible phenomenological framework to alleviate the cosmological coincidence problem in the context of holographic dark energy. Some properties of the evolution which are relevant to cosmological parameters are also discussed.

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