Behaviours of rip cosmological models in f(Q,C) gravity

IF 2.5 3区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS Nuclear Physics B Pub Date : 2024-08-02 DOI:10.1016/j.nuclphysb.2024.116643
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Abstract

In this study, the Universe's rip cosmology theories have been provided for the f(Q,C) gravity theory, where Q and C stand for the non-metricity scalar and boundary term. We assume f(Q,C)=αQn+βC and analyze the nature of the physical parameters for the Little Rip (LR), Big Rip (BR) and Pseudo Rip (PR) models. In the LR and PR models, the EoS parameter exhibits phantom characteristics but remains closely aligned with the ΛCDM line. The non-metricity term Q has direct effect on the rip models. After investigating the energy conditions, we recognise that our model violates the strong energy constraint. Avoiding singularity situations has been noted in all of these accelerated models. The characteristics of the jerk and snap parameters have been investigated. Our model provides an effective description of the Universe's evolutionary history and fits well with contemporary cosmic data.

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f(Q,C)引力下裂痕宇宙学模型的行为
本研究为引力理论提供了宇宙裂解宇宙学理论,其中 和 分别代表非度量标量和边界项。我们假设并分析了小裂解(LR)、大裂解(BR)和伪裂解(PR)模型的物理参数性质。在LR和PR模型中,EoS参数表现出幻影特征,但仍然与ΛCDM线密切相关。非度量项对撕裂模型有直接影响。在研究了能量条件之后,我们发现我们的模型违反了强能量约束。我们注意到所有这些加速模型都避免了奇点情况。此外,我们还研究了抽动参数和快断参数的特性。我们的模型有效地描述了宇宙的演化历史,并与当代宇宙数据非常吻合。
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来源期刊
Nuclear Physics B
Nuclear Physics B 物理-物理:粒子与场物理
CiteScore
5.50
自引率
7.10%
发文量
302
审稿时长
1 months
期刊介绍: Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.
期刊最新文献
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