Interacting Rényi Holographic Dark Energy in the Brans-Dicke Theory

IF 1.5 4区物理与天体物理 Q3 PHYSICS, PARTICLES & FIELDS

Advances in High Energy Physics Pub Date : 2021-03-02 DOI:10.1155/2021/6658862

V. Dubey, U. Sharma, A. A. Mamon

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引用次数: 8

Abstract

In this work, we construct an interacting model of the Renyi holographic dark energy in the Brans-Dicke theory of gravity using Renyi entropy in a spatially flat Friedmann-Lemaitre-Robertson-Walker Universe considering the infrared cut-off as the Hubble horizon. In this setup, we then study the evolutionary history of some important cosmological parameters, in particular, deceleration parameter, Hubble parameter, equation of state parameter, and Renyi holographic dark energy density parameter in both nonflat Universe and flat Universe scenarios and also observe satisfactory behaviors of these parameters in the model. We find that during the evolution, the present model can give rise to a late-time accelerated expansion phase for the Universe preceded by a decelerated expansion phase for both flat and nonflat cases. Moreover, we obtain as , which indicates that this model behaves like the cosmological constant at the future. The stability analysis for the distinct estimations of the Renyi parameter and coupling coefficient has been analyzed. The results indicate that the model is stable at the late time.

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Brans-Dicke理论中r全息暗能量的相互作用

在这项工作中，我们利用空间平坦的friedman - lemaitre - robertson - walker宇宙中的Renyi熵，将红外截止点作为哈勃视界，构建了Brans-Dicke引力理论中Renyi全息暗能量的相互作用模型。在此基础上，我们研究了一些重要的宇宙学参数，特别是减速参数、哈勃参数、状态方程参数和Renyi全息暗能量密度参数在非平坦宇宙和平坦宇宙两种场景下的演化历史，并观察到这些参数在模型中的令人满意的行为。我们发现，在演化过程中，目前的模型可以引起宇宙在平坦和非平坦情况下的晚时间加速膨胀阶段，然后是减速膨胀阶段。此外，我们得到as，这表明该模型在未来的行为类似于宇宙常数。分析了Renyi参数和耦合系数的不同估计的稳定性分析。结果表明，该模型在后期是稳定的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in High Energy Physics PHYSICS, PARTICLES & FIELDS-

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

6-12 weeks

期刊介绍： Advances in High Energy Physics publishes the results of theoretical and experimental research on the nature of, and interaction between, energy and matter. Considering both original research and focussed review articles, the journal welcomes submissions from small research groups and large consortia alike.