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Barrow HDE model for statefinder diagnostic in FLRW universe
International Journal of Modern Physics A ( IF 1.4 ) Pub Date : 2021-01-25 , DOI: 10.1142/s0217751x21500305
Anirudh Pradhan 1 , Archana Dixit 1 , Vinod Kumar Bhardwaj 1
Affiliation  

We have analyzed the Barrow holographic dark energy (BHDE) in the framework of flat FLRW universe by considering the various estimations of Barrow exponent △. Here, we define BHDE, by applying the usual holographic principle at a cosmological system, for utilizing the Barrow entropy rather than the standard Bekenstein–Hawking. To understand the recent accelerated expansion of the universe, consider the Hubble horizon as the IR cutoff. The cosmological parameters, especially the density parameter [Formula: see text], the equation of the state parameter [Formula: see text], energy density [Formula: see text] and the deceleration parameter [Formula: see text] are studied in this paper and found the satisfactory behaviors. Moreover we additionally focus on the two geometric diagnostics, the statefinder [Formula: see text] and [Formula: see text] to discriminant BHDE model from the [Formula: see text]CDM model. Here we determined and plotted the trajectories of evolution for statefinder [Formula: see text], [Formula: see text] and [Formula: see text] diagnostic plane to understand the geometrical behavior of the BHDE model by utilizing Planck 2018 observational information. Finally, we have explored the new Barrow exponent △, which strongly affects the dark energy equation of state that can lead it to lie in the quintessence regime, phantom regime and exhibits the phantom-divide line during the cosmological evolution.

中文翻译:

用于 FLRW 宇宙中状态查找器诊断的 Barrow HDE 模型

我们通过考虑巴罗指数△的各种估计,分析了扁平FLRW宇宙框架下的巴罗全息暗能量(BHDE)。在这里,我们通过在宇宙系统中应用通常的全息原理来定义 BHDE,以利用 Barrow 熵而不是标准的 Bekenstein-Hawking。要了解最近宇宙的加速膨胀,请将哈勃视界视为红外截止值。本文研究了宇宙学参数,特别是密度参数[公式:见文]、状态参数方程[公式:见文]、能量密度[公式:见文]和减速参数[公式:见文]纸并找到令人满意的行为。此外,我们还关注两个几何诊断,statefinder [公式:参见文本] 和 [公式:见文本]从[公式:见文本]CDM模型到判别BHDE模型。在这里,我们确定并绘制了 statefinder [公式:见文本]、[公式:见文本] 和 [公式:见文本] 诊断平面的演化轨迹,以利用 Planck 2018 观测信息了解 BHDE 模型的几何行为。最后,我们探索了新的巴罗指数△,它强烈影响暗能量状态方程,使其处于精粹态、幻影态,并在宇宙演化过程中呈现出幻影分界线。见文本] 诊断平面,通过利用 Planck 2018 观测信息来了解 BHDE 模型的几何行为。最后,我们探索了新的巴罗指数△,它强烈影响暗能量状态方程,使其处于精粹态、幻影态,并在宇宙演化过程中呈现出幻影分界线。见文本] 诊断平面,通过利用 Planck 2018 观测信息来了解 BHDE 模型的几何行为。最后,我们探索了新的巴罗指数△,它强烈影响暗能量状态方程,使其处于精粹态、幻影态,并在宇宙演化过程中呈现出幻影分界线。
更新日期:2021-01-25
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