Phase space analysis of Rényi Holographic dark energy model

IF 2.8 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Santanu Das, Nilanjana Mahata
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引用次数: 0

Abstract

Recent observational evidences point out towards a late time acceleration of the universe. In order to study the accelerated expansion, scientists have incorporated the existence of an exotic matter with negative pressure, termed as dark energy. Afterwards a new idea of dark energy has been studied depending on the holographic principle of quantum gravity, called as the Holographic Dark Energy(HDE). Later on modifying Bekestein-Hawking entropy, different generalized entropies have been proposed, one of them being Rényi entropy which leads to Rényi holographic dark energy model (RHDE). We have considered RHDE model with Hubble horizon as the IR cut off and have studied the cosmological behaviour under non interacting, linear and non-linear interacting scenarios with the help of dynamical systems analysis. We have also investigated the stability of the system around hyperbolic critical points along with the type of fluid description, evolution of equation of state parameter as well as matter and energy density parameters.

r尼全息暗能量模型的相空间分析
最近的观测证据指出了宇宙的后期加速。为了研究加速膨胀,科学家们将一种具有负压的奇异物质的存在纳入其中,这种物质被称为暗能量。随后,人们根据量子引力全息原理研究了一种新的暗能量概念,称为全息暗能量(HDE)。后来,在修正Bekestein-Hawking熵的基础上,提出了不同的广义熵,其中一种广义熵是rsamunyi熵,并由此导出了rsamunyi全息暗能量模型(RHDE)。我们考虑了以哈勃视界作为红外截止点的RHDE模型,并借助动力系统分析研究了非相互作用、线性和非线性相互作用情景下的宇宙学行为。我们还研究了系统在双曲临界点附近的稳定性,以及流体描述的类型、状态方程参数的演化以及物质和能量密度参数。
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来源期刊
General Relativity and Gravitation
General Relativity and Gravitation 物理-天文与天体物理
CiteScore
4.60
自引率
3.60%
发文量
136
审稿时长
3 months
期刊介绍: General Relativity and Gravitation is a journal devoted to all aspects of modern gravitational science, and published under the auspices of the International Society on General Relativity and Gravitation. It welcomes in particular original articles on the following topics of current research: Analytical general relativity, including its interface with geometrical analysis Numerical relativity Theoretical and observational cosmology Relativistic astrophysics Gravitational waves: data analysis, astrophysical sources and detector science Extensions of general relativity Supergravity Gravitational aspects of string theory and its extensions Quantum gravity: canonical approaches, in particular loop quantum gravity, and path integral approaches, in particular spin foams, Regge calculus and dynamical triangulations Quantum field theory in curved spacetime Non-commutative geometry and gravitation Experimental gravity, in particular tests of general relativity The journal publishes articles on all theoretical and experimental aspects of modern general relativity and gravitation, as well as book reviews and historical articles of special interest.
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