Generalized entropies and corresponding holographic dark energy models
Generalized entropies and corresponding holographic dark energy models
复制标题
DOI：
10.1140/epjc/s10052-020-8307-x
复制
发表时间：
2020-08-12
影响因子：
4.4
通讯作者：
Zangeneh, M. Kord
中科院分区：
文献类型：
--
作者：
Moradpour, H.;Ziaie, A. H.;Zangeneh, M. Kord
利用Tsallis统计量及其与玻尔兹曼熵的关系，获得了黑洞的Tsallis熵含量，这一结果与最近的一项研究完全一致（Mejrhit和Ennadifi in Phys Lett B 794:24, 2019）。此外，利用Kaniadakis统计量及其与Tsallis统计量的关系，得到了黑洞的Kaniadakis熵。利用黑洞的Sharma-Mittal和Renyi熵与Tsallis熵的关系，讨论了黑洞的熵含量。在此基础上，基于全息暗能量假设和得到的熵，介绍了两种新的全息暗能量模型，并研究了当背景中存在无压流体时，它们对平坦FRW宇宙动力学的影响。在我们的设置中，视视界被认为是红外截止点，宇宙流体之间没有任何相互作用。结果表明，所获得的宇宙学模型(1)在描述从物质主导时代到当前加速宇宙的宇宙演化方面具有显著的能力；(2)对宇宙年龄的预测是合适的。
Using Tsallis statistics and its relation with Boltzmann entropy, the Tsallis entropy content of black holes is achieved, a result in full agreement with a recent study (Mejrhit and Ennadifi in Phys Lett B 794:24, 2019). In addition, employing Kaniadakis statistics and its relation with that of Tsallis, the Kaniadakis entropy of black holes is obtained. The Sharma-Mittal and Renyi entropy contents of black holes are also addressed by employing their relations with Tsallis entropy. Thereinafter, relying on the holographic dark energy hypothesis and the obtained entropies, two new holographic dark energy models are introduced and their implications on the dynamics of a flat FRW universe are studied when there is also a pressureless fluid in background. In our setup, the apparent horizon is considered as the IR cutoff, and there is not any mutual interaction between the cosmic fluids. The results indicate that the obtained cosmological models have (i) notable powers to describe the cosmic evolution from the matter-dominated era to the current accelerating universe, and (ii) suitable predictions for the universe age.