New Holographic Dark Energy Model in Brans-Dicke Theory

Symmetry

Syed Asif Ali Shah¹  M. Sharif¹  Kazuharu Bamba² 

[1] Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan;Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan;

关键词: brans-dicke theory;    dark energy model;    cosmological parameters;   

DOI  :  10.3390/sym10050153

来源: DOAJ

【 摘 要 】

We study the cosmic evolution of the Bianchi type I universe by using new holographic dark energy model in the context of the Brans-Dicke theory for both non-interacting and interacting cases between dark energy and dark matter. We evaluate the equation of state for dark energyω Dand draw the ω D− ω ˙D plane, where the dot denotes the time derivative. It is found that a stage in which the cosmic expansion is accelerating can be realized in both cases. In addition, we investigate the stability of the model by analyzing the sound speed. As a result, it is demonstrated that for both cases, the behavior of the sound speed becomes unstable. Furthermore, with the Om-diagnostic tool, it is shown that the quintessence region of the universe can exist.

【 授权许可】

Unknown