Holographic principle inspired dark energy description of unified early and late universe in viscous mimetic gravity

IF 5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics of the Dark Universe Pub Date : 2024-11-23 DOI:10.1016/j.dark.2024.101742

G.S. Khadekar , Saibal Ray , Aritra Sanyal , Praveen Kumar Dhankar

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Abstract

In this study, we explore the mimetic matter model proposed by Chamseddine and Mukhanov (2013), utilizing the holographic principle to coherently describe both the early and late universe when bulk viscosity is present in the inhomogeneous equation of state. Our examination of the universe’s evolution is based on the generalized infrared-cutoff holographic dark energy model detailed by Nojiri and Odintsov (2017) within the context of the flat FRW model. From a holographic perspective, we derive the energy conservation equation incorporating mimetic matter through a viscous holographic fluid model. Furthermore, we analyze various scenarios of bulk viscosity by assuming a constant equation of state parameter and derive the infrared cut-off expression in terms of the particle horizon. We demonstrate that within the framework of mimetic gravity, there is a class of solutions comparable to those in General Relativity, with an additional contribution from a non-relativistic mimetic matter component. These solutions can effectively describe dark matter.

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全息原理启发的暗能量描述粘性模拟引力中统一的早期和晚期宇宙

在本研究中，我们探索了 Chamseddine 和 Mukhanov（2013 年）提出的拟态物质模型，利用全息原理来连贯地描述非均质状态方程中存在体粘性时的早期和晚期宇宙。我们对宇宙演化的研究是基于 Nojiri 和 Odintsov（2017 年）在平面 FRW 模型背景下详细阐述的广义红外截止全息暗能量模型。从全息的角度，我们通过粘性全息流体模型推导出了包含拟态物质的能量守恒方程。此外，我们还通过假设恒定的状态方程参数分析了各种体积粘度情况，并推导出了粒子视界的红外截止表达式。我们证明，在拟态引力框架内，有一类解与广义相对论中的解相媲美，其中还有非相对论拟态物质成分的额外贡献。这些解可以有效地描述暗物质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of the Dark Universe ASTRONOMY & ASTROPHYSICS-

CiteScore

9.60

自引率

7.30%

发文量

118

审稿时长

61 days

期刊介绍： Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact. The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.