Analysis of generalized ghost dark energy and new holographic dark energy in Chameleon Brans-Dicke theory

被引：2

作者：

Biswas, Mahasweta ^{[1
]}

Debnath, Ujjal ^{[2
]}

机构：

[1] Sonarpur Mahavidyalaya, Dept Math, South 24 Parganas, W Bengal, India

[2] Indian Inst Engn Sci & Technol, Dept Math, Howrah 711103, W Bengal, India

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2022年 / 37卷 / 13期

关键词：

General relativity; modified gravity; dark energy; dark matter; PROBE WMAP OBSERVATIONS; COSMOLOGICAL CONSTANT; CURRENT-ALGEBRA; U(1); INSTABILITY; UNIVERSE; CONSTRAINTS; PRINCIPLE; MODELS;

D O I：

10.1142/S0217751X22500816

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In this work, we discuss the stability analysis of generalized ghost dark energy (GGDE) and new holographic dark energy (NHDE) in the framework of Chameleon Brans-Dicke (CBD) gravity. The adiabatic squared sound speed v(s)(2) plays a crucial role to analyze the stability of the models. We know that the models are stable if v(s)(2) > 0 and unstable if v(s)(2) < 0. We study the interacting and noninteracting versions of GGDE and NHDE with dark matter in CBD model in a nonflat FLRW universe. We also try to show that in all cases of investigation, the models are classically stable with suitable choices of parameters. Finally, we analyze the perturbative analysis for both GGDE and NHDE models in the background of CBD gravity.

引用

页数：42

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