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arXiv 2209.01415gr-qc
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解析解和观测支持:用$f(R,T)=R+h(T)$研究$f(R,T)$引力

Analytic Solutions and Observational support: A study of $f(R,T)$ gravity with $f(R,T)=R+h(T)$

Akash Bose, Gopal Sardar, Subenoy Chakraborty

摘要:

本文研究了具有常值状态方程的理想流体($ω$)的$f(R,T)$引力理论的宇宙学解。对于一个可行的宇宙学解,$ω$被限制为$ω<\dfrac{1}{3}$。同样,根据任意常数的符号,我们有两种可能的解:有限宇宙模型和不断膨胀的宇宙模型。研究了该模型的场论描述和鬼标量场的可能性。此外,与修改的Chaubergin气体的等价性已被证明。最后,从观测数据中得出结论,该模型代表了宇宙从物质主导阶段到现在的加速阶段的演化。

英文摘要:

The present work deals with cosmological solutions in $f(R,T)$ gravity theory for perfect fluid with constant equation of state ($ω$). For a viable cosmological solution $ω$ is restricted to $ω<\dfrac{1}{3}$. Also depending on the sign of an arbitrary constant one has two possible solutions: a finite universe model and an ever expanding model of the universe. Field theoretic description of the model and possibility of a ghost scalar field has been studied. Also, an equivalence with modified Chaplygin gas has been shown. Finally, from the observational data it has been concluded that this model represents an evolution of the universe from matter dominated phase to present accelerating phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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