论文标题
$ f（r，t）$ gravity的参数性暗能模型的动力学
Dynamics of a parametrized dark energy model in $f(R,T)$ gravity
论文作者
论文摘要
我们研究了$ f（r，t）$ - 重力中的平坦FLRW模型，其中包括标量曲率$ r $的二次变化和应力 - 能量张量tensor $ t $的线性术语。反过来，我们建立了该模型具有后期宇宙的行为，该模型被加速扩展并最终陷入了巨大的裂口。使用比例因子$ a（t）$的参数化，我们提出了一个模型，该模型从点型奇点开始，即模型以零体积，无限能量密度和无限温度的点开始。目前，该模型的行为正在加速扩大，并且在后期$λ$ CDM。最后，所提出的模型在当前的时间就像典型的暗能量模型，并且与后期的标准宇宙学$λ$ CDM一致。
We investigate a flat FLRW-model in $f(R,T)$-gravity, which includes the quadratic variation in scalar curvature $R$ and the linear term of the trace of the stress-energy tensor $T$. In turn, we establish the model has the behaviour of the late time Universe, which is accelerated expanding and ends up in a big rip. Using the parametrization of scale factor $a(t)$, we propose a model, which begins with point-type singularity, i.e., the model starts with a point of zero volume, infinite energy density and infinite temperature. The model's behaviour is accelerated expanding at present and $Λ$CDM in late times. Finally, the proposed model behaves like a quintessence dark energy model in the present time and is consistent with standard cosmology $Λ$CDM in late times.
