热力学分析的宇宙演化研究

IF 4.2 2区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS
M. Sharif, M. Zeeshan Gul, Nusrat Fatima
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引用次数: 0

摘要

本文研究了对称远平行理论框架下的宇宙演化,其特征是非度量标量函数((\mathcal {Q})\)。我们利用电子折叠数和重构方法,并对尺度因子进行适当的参数化,得到了对称远平行理论的函数形式。利用这个重构模型,我们考察了不同宇宙参数的行为,分别考虑了宇宙在弹跳点前后的收缩和膨胀阶段,以证明宇宙的弹跳情景。研究发现,空能条件被违反,这表明奇点问题可以在这个扩展的理论框架中得到解决。此外,我们观察到加速发生在弹跳点附近,重建的模型与当前的宇宙膨胀一致。最后,我们检验了热力学第二定律在我们模型的弹跳框架中的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of cosmic evolution admitting thermodynamic analysis

This article examines the cosmic evolution in the framework of symmetric teleparallel theory, characterized by the function of non-metricity scalar \((\mathcal {Q})\). We use the e-folding number and reconstruction method with a suitable parametrization of the scale factor to obtain the functional form of symmetric teleparallel theory. Using this reconstructed model, we examine the behavior of different cosmographic parameters to demonstrate the bouncing scenarios of the cosmos by considering the contraction and expansion phases of cosmos before and after the bouncing point, respectively. It is found that the null energy condition is violated which shows that the singularity issue can be resolved in this extended theoretical framework. Moreover, we observe that the acceleration occurs near the bouncing point and the reconstructed model aligns with the current cosmic expansion. Finally, we check the validity of second law of thermodynamics in the bouncing framework of our model.

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来源期刊
The European Physical Journal C
The European Physical Journal C 物理-物理:粒子与场物理
CiteScore
8.10
自引率
15.90%
发文量
1008
审稿时长
2-4 weeks
期刊介绍: Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.
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