将ΛCDM框架嵌入具有物质耦合的非最小f(Q)引力中

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2024-08-02 DOI:10.1016/j.physletb.2024.138927

N.S. Kavya, V. Venkatesha

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引用次数: 0

摘要

在探索宇宙动力学的过程中，修正引力理论为暗能量提供了另一种解释。虽然ΛCDM模型是理解宇宙的基础描述，但它也有其局限性。我们这项研究的主要目标就是克服这些缺陷，重建ΛCDM 宇宙。我们的目标是通过将ΛCDM情景嵌入修正引力框架来实现这一目标。这里的研究是在新颖的非最小引力耦合框架内进行的。我们考虑了一种通用的非最小形式，用两个任意函数和来表示。模拟ΛCDM范式得出了解析解。最后，通过宇宙学分析，模型与观测结果进行了验证。

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Embedding the ΛCDM framework in non-minimal f(Q) gravity with matter-coupling

In exploring the dynamics of the Universe, modified gravity theories offer an alternative explanation for dark energy. Although the ΛCDM model has served as a foundational description for understanding the Universe, it also has its limitations. Our primary objective in this study is to overcome these shortcomings and reconstruct the ΛCDM Universe. We aim to achieve this by embedding the ΛCDM scenario within a modified gravity framework. Here, the investigation is conducted within the framework of novel non-minimal coupling of $f (Q)$ gravity. A generic non-minimal form is considered, expressed in terms of two arbitrary functions $f_{1} (Q)$ and $f_{2} (Q)$ . Analytic solutions are derived to mimic the ΛCDM paradigm. Finally, through cosmographic analysis, the models are validated against observational results.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.