非平坦Friedmann-Robertson-Walker宇宙中Barrow全息暗能量的宇宙演化与热稳定性
Cosmic evolution and thermal stability of Barrow holographic dark energy in nonflat Friedmann-Robertson-Walker Universe
AI总结：
该研究以表观视界为红外截断，分析了非平坦FRW宇宙中有无暗成分相互作用的Barrow全息暗能量模型的演化参数与观测一致性，发现相互作用模型更受观测数据支持，并探讨了模型的热稳定性。
摘要：
我们研究了充满无压暗物质与Barrow全息暗能量（Barrow Holographic Dark Energy，简称BHDE）的非平坦Friedmann-Robertson-Walker宇宙的宇宙学演化。BHDE是一种基于全息原理的暗能量模型，采用Barrow熵替代标准的Bekenstein-Hawking熵。我们以宇宙的表观视界作为红外截断，分别探究了宇宙中暗成分之间不存在相互作用与存在相互作用的两种情形。我们分析了多个模型参数的演化行为，包括BHDE密度参数、物态方程参数、减速参数、加加速度参数以及声速平方。我们还讨论了理论预测的观测一致性，结果表明，与非相互作用模型相比，相互作用模型更受Planck+WP+BAO、SNIa+CMB+LSS以及Union2 SNIa联合分析的最新实验约束的支持。最后，我们通过要求宇宙流体的热容与压缩率为正，讨论了该理论框架的热稳定性。
英文摘要：
We study the cosmological evolution of a nonflat Friedmann-Robertson-Walker Universe filled by pressureless dark matter and Barrow Holographic Dark Energy (BHDE). The latter is a dark energy model based on the holographic principle with Barrow entropy instead of the standard Bekenstein-Hawking one. By assuming the apparent horizon of the Universe as IR cutoff, we explore both the cases where a mutual interaction between the dark components of the cosmos is absent/present. We analyze the behavior of various model parameters, such as the BHDE density parameter, the equation of state parameter, the deceleration parameter, the jerk parameter and the square of sound speed. We also comment on the observational consistency of our predictions, showing that the interacting model turns out to be favored by recent experimental constraints from Planck+WP+BAO, SNIa+CMB+LSS and Union2 SNIa joint analysis over the non-interacting one. The thermal stability of our framework is finally discussed by demanding the positivity of the heat capacities and compressibilities of the cosmic fluid.
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