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arXiv 2101.04060gr-qcastro-ph.CO
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高维宇宙学中的Renyi全息暗能量

R\' enyi Holographic Dark Energy in Higher Dimension Cosmology

Arindam Saha, Souvik Ghose, Anirban Chanda, Bikash Chandra Paul

摘要:

Rényi全息暗能量(RHDE)对应是在高维宇宙学即Kaluza-Klein(KK)宇宙学中讨论的。相互作用和非相互作用的宇宙学场景被认为在这里。研究发现,非相互作用模型自然会导致宇宙的晚期加速,而不像4 $D$中的标准全息暗能量模型,它需要相互作用来适应宇宙的晚期加速。相互作用模型产生了一个加速宇宙在晚些时候,虽然未能达到估计的减速参数的现值。不同的宇宙学相关参数的演变进行了估计。在这里,我们认为两个诊断测试,即状态发现和$Om$诊断研究的非相互作用模型,这是更有利于在最近的宇宙学观测。讨论了宇宙学模型的经典稳定性

英文摘要:

Rényi holographic dark energy (RHDE) correspondence is discussed in higher dimensional cosmology, namely Kaluza-Klein (KK) cosmology. Both interacting and non-interacting cosmological scenario are considered here. It is found that the non-interacting model naturally leads to the late accelerated universe, unlike the standard Holographic Dark Energy models in 4$D$, which requires interaction to accommodate the late-time acceleration of the universe. The interacting model produces an accelerating universe at late time albeit failing to attain the estimated present value of the deceleration parameter. The evolution of different cosmologically relevant parameters have been estimated. We consider here two diagnostic tests namely, state-finder and $Om$ diagnostics to study the non-interacting model which is more favoured in the light of recent cosmological observations. Classical stability of the cosmological models are also discussed

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