f(G,T)及其宇宙学意义

IF 1.1 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Canadian Journal of Physics Pub Date : 2023-11-10 DOI:10.1139/cjp-2023-0200

Z. Yousaf, M.Z. Bhatti, Timothy Ganesan Andrew, H. Aman

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引用次数: 0

摘要

Gauss-Bonnet不变量项G与的耦合表达式能量动量迹T项提供修正的f(G,T)重力，已在本研究中进行了分析。 f(G,T)重力取为f(G,T)=αT+ βGn， α和β是自由参数。场方程为生产一般，然后用防尘盒提取小说哈勃参数。假设模型的稳定性及解释对后期加速度进行了研究，用能量绑定。进一步，利用动态变量分析了约束差分的状态参数方程的行为;有关最近观测资料的参数。一个# x0D;精粹式的进化是这一过程的结果研究。

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f(G,T) and its Cosmological Implications

A coupled formulation of the Gauss-Bonnet invariant term G and the energy momentum trace T term provide a modified f(G,T) gravity, has been analyzed in this study. The functional form for the f(G,T) gravity has been taken as f(G,T)=αT+ βGⁿ, α and β are free parameters. The field equations are produced in general, which then used a dust case to extract a novel Hubble parameter. The stability of the assumed model and explanation for the late time acceleration have been studied by the energy bound. Furthermore, the dynamical variables are used to analyze the behavior of the equation of state parameter by restricting different parameters with respect to the recent observational data. A quintessence-like evolution has been achieved as a result of this study.

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来源期刊

Canadian Journal of Physics 物理-物理：综合

CiteScore

2.30

自引率

8.30%

发文量

审稿时长

1.7 months

期刊介绍： The Canadian Journal of Physics publishes research articles, rapid communications, and review articles that report significant advances in research in physics, including atomic and molecular physics; condensed matter; elementary particles and fields; nuclear physics; gases, fluid dynamics, and plasmas; electromagnetism and optics; mathematical physics; interdisciplinary, classical, and applied physics; relativity and cosmology; physics education research; statistical mechanics and thermodynamics; quantum physics and quantum computing; gravitation and string theory; biophysics; aeronomy and space physics; and astrophysics.