Generalized interacting Barrow Holographic Dark Energy: Cosmological predictions and thermodynamic considerations

被引：16

作者：

Luciano, G. G. ^{[1
]}

Gine, J. ^{[2
]}

机构：

[1] Univ Lleida, Environm Sci Dept, Appl Phys Sect, Ave Jaume II,69, Lleida 25001, Catalonia, Spain

[2] Univ Lleida, Dept Matemat, Ave Jaume II,69, Lleida 25001, Spain

来源：

PHYSICS OF THE DARK UNIVERSE | 2023年 / 41卷

关键词：

Holographic Dark Energy; Barrow entropy; Quantum gravity; OBSERVATIONAL CONSTRAINTS; BLACK-HOLES; MODELS; ACCELERATION; CONSTANT; REDSHIFT; ENTROPY; LAMBDA;

D O I：

10.1016/j.dark.2023.101256

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We construct a generalized interacting model of Barrow Holographic Dark Energy (BHDE) with infrared cutoff being given by the Hubble horizon. We analyze the cosmological evolution of a flat Friedmann- Lemaitre-Robertson-Walker Universe filled by pressureless dark matter, BHDE and radiation fluid. The interaction between the dark sectors of the cosmos is assumed of non-gravitational origin and satisfying both the second law of thermodynamics and Le Chatelier-Braun principle. We study 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 investigate cosmological perturbations in the linear regime on sub-horizon scales, studying the growth rate of matter fluctuations for clustering dark matter and a homogeneous dark energy component. We show that our model satisfactorily retraces the thermal history of the Universe and is consistent with current observations for certain values of model parameters, providing an eligible candidate to describe dark energy. We finally explore the thermodynamics of our framework, with special focus on the validity of the generalized second law.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：14

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