Teleparallel gravity and quintessence: The role of nonminimal boundary couplings

IF 3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
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引用次数: 0

Abstract

In this paper, we have outlined the development of an autonomous dynamical system within a general scalar-tensor gravity framework. This framework encompasses the overall structure of the non-minimally coupled scalar field functions for both the torsion scalar (T) and the boundary term (B). We have examined three well-motivated forms of potential functions and constrained the model parameters through dynamical system analysis. This analysis has played a crucial role in identifying cosmologically viable models. We have analysed the behaviour of dynamical parameters such as equation-of-state parameters, as well all the standard density parameters for radiation, matter, and dark energy to assess their compatibility with current observational data. The phase space diagrams are presented to support the stability conditions of the corresponding critical points. The Universe is apparent in its late-time cosmic acceleration phase via the dark energy-dominated critical points. Additionally, we compare our findings with the most prevailing ΛCDM model. The outcomes are further inspected using the cosmological data sets of Supernovae Ia and the Hubble rate H(z).
远平行引力与五重性:非最小边界耦合的作用
在本文中,我们概述了在一般标量张量引力框架内开发自主动力系统的过程。该框架包括扭转标量(T)和边界项(B)的非最小耦合标量场函数的整体结构。我们研究了三种动机良好的势函数形式,并通过动力系统分析对模型参数进行了约束。这种分析在确定宇宙学上可行的模型方面发挥了至关重要的作用。我们分析了动力学参数(如状态方程参数)的行为,以及辐射、物质和暗能量的所有标准密度参数,以评估它们与当前观测数据的兼容性。我们给出了相空间图,以支持相应临界点的稳定条件。通过暗能量主导的临界点,宇宙显然处于晚期宇宙加速阶段。此外,我们还将我们的发现与最流行的ΛCDM模型进行了比较。我们还利用超新星 Ia 和哈勃速率 H(z) 的宇宙学数据集进一步检验了研究结果。
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
Annals of Physics
Annals of Physics 物理-物理:综合
CiteScore
5.30
自引率
3.30%
发文量
211
审稿时长
47 days
期刊介绍: Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.
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