Cosmological behavior of a hyperbolic solution in f(Q) gravity

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Astronomy and Computing Pub Date : 2025-01-04 DOI:10.1016/j.ascom.2024.100926

K. Haloi, R. Roy Baruah

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引用次数: 0

Abstract

In this work, we study the universe’s dynamics in the context of f(Q) gravity by use of a flat FLRW model. Two particular forms are considered:

f (Q) = Q - λ Q

and

f (Q) = Q - λ Q^{2}

, where Q and

λ

represent the nonmetricity and arbitrary constant, respectively. We take a special form for the scale factor,

a = s i n h {(t)}^{\frac{1}{α}}

, to solve the Friedmann field equations within the f(Q) formalism. The scale factor’s behavior is here determined by the model parameter

α

. In our model, we primarily analyze the behavior of the equation of state parameter

ω

. We examine the scalar field and examine the resultant solution’s energy conditions. We use a number of diagnostic techniques, including the Jerk, Om, and statefinder diagnostic tools, to validate our model. We also include the observational constraints from the BAO and Hubble databases. A thorough explanation of the outcomes and the model is given.

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f(Q)重力下双曲解的宇宙学行为

在这项工作中，我们通过使用平坦的FLRW模型研究了f(Q)重力背景下的宇宙动力学。考虑了两种特殊形式：f(Q)=Q−λQ和f(Q)=Q−λ q2，其中Q和λ分别表示非度量性和任意常数。我们采用比例因子的一种特殊形式，a=sinh(t)1α，来解f(Q)形式下的弗里德曼场方程。比例因子的行为在这里由模型参数α决定。在我们的模型中，我们主要分析状态参数ω方程的行为。我们考察标量场并考察结果解的能量条件。我们使用了多种诊断技术，包括Jerk、Om和statfinder诊断工具来验证我们的模型。我们还包括来自BAO和哈勃数据库的观测约束。对结果和模型进行了详细的解释。

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

Astronomy and Computing ASTRONOMY & ASTROPHYSICSCOMPUTER SCIENCE,-COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

CiteScore

4.10

自引率

8.00%

发文量

期刊介绍： Astronomy and Computing is a peer-reviewed journal that focuses on the broad area between astronomy, computer science and information technology. The journal aims to publish the work of scientists and (software) engineers in all aspects of astronomical computing, including the collection, analysis, reduction, visualisation, preservation and dissemination of data, and the development of astronomical software and simulations. The journal covers applications for academic computer science techniques to astronomy, as well as novel applications of information technologies within astronomy.