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arXiv 2007.16020gr-qc
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相互作用Barrow全息暗能量模型的动力学及其热力学意义

Dynamics of an Interacting Barrow Holographic Dark Energy Model and its Thermodynamic Implications

Abdulla Al Mamon, Andronikos Paliathanasis, Subhajit Saha

摘要:

利用Barrow熵,提出了Barrow全息暗能量(BHDE)的相互作用模型.特别是,我们研究了一个空间平坦的FLRW宇宙组成的无压暗物质和BHDE,通过一个动机良好的相互作用项相互作用的演变。以Hubble视界为红外截止点,研究了BHDE模型中重要宇宙学参数,特别是密度参数、状态方程参数和减速参数的演化历史,得到了令人满意的结果。通过研究场方程的渐近行为,我们对场方程的动力学进行了详细的研究,同时利用Laurent级数给出了标度因子的解析表达式。最后,我们研究了以动力学视视界为宇宙边界的相互作用BHDE模型中引力热力学的意义。特别地,我们研究了广义第二定律的可行性,假设视视界被赋予霍金温度和巴罗熵。

英文摘要:

In this paper, using Barrow entropy, we propose an interacting model of Barrow holographic dark energy (BHDE). In particular, we study the evolution of a spatially flat FLRW universe composed of pressureless dark matter and BHDE that interact with each other through a well-motivated interaction term. Considering the Hubble horizon as the IR cut-off, we then study the evolutionary history of important cosmological parameters, particularly, the density parameter, the equation of state parameter, and the deceleration parameter in the BHDE model and find satisfactory behaviors in the model. We perform a detailed study on the dynamics of the field equations by studying the asymptotic behavior of the field equations, while we write the analytic expression for the scale factor with the use of Laurent series. Finally, we study the implications of gravitational thermodynamics in the interacting BHDE model with the dynamical apparent horizon as the cosmological boundary. In particular, we study the viability of the generalized second law by assuming that the apparent horizon is endowed with Hawking temperature and Barrow entropy.

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