论文标题

$ f(r,t)$重力中的混合流体宇宙学模型

Mixed fluid cosmological model in $f(R,T)$ gravity

论文作者

Sahoo, Parbati, Taori, Barkha, Mahanta, K. L.

论文摘要

我们在$ f(r,t)$重力理论中构建本地旋转对称(LRS)bianchi type-i宇宙学模型时,当重力来源是通过使用时间变化的减速参数(DP)的时间变化,是压力液和暗能量(DE)的混合物。我们通过状态查找器参数的行为观察$(r,s)$,我们的模型从爱因斯坦静态时代开始,并转到$λ$ CDM时代。 de的EOS参数($ω_d$)因幻影($ω<-1 $)阶段而异,而Quintessence($ω> -1 $)阶段与观察结果一致。发现讨论的模型可以重现宇宙扩展的当前加速阶段。

We construct Locally Rotationally Symmetric (LRS) Bianchi type-I cosmological model in $f(R,T)$ theory of gravity when the source of gravitation is the mixture of barotropic fluid and dark energy (DE) by employing a time varying deceleration parameter (DP). We observe through the behavior of the state finder parameters $(r, s)$ that our model begins from the Einstein static era and goes to $Λ$CDM era. The EoS parameter($ω_d$) for DE varies from phantom ($ω<-1$) phase to quintessence ($ω>-1$) phase which is consistent with the observational results. It is found that the discussed model can reproduce the current accelerating phase of expansion of the universe.

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