论文标题
$ f（q，t）$重力中的能源条件
Energy conditions in $f(Q,T)$ gravity
论文作者
论文摘要
最近提出的$ f（q，t）$重力（Xu etal。Eur。Phys。J.C\ textbf {79}（2019）708）是对称触发性重力的扩展。重力动作$ l $由任意函数$ f $ $ f $ $ q $和物质能量动量张量$ t $给出。在本文中，我们研究了$ f（q，t）$重力模型的某些提示形式的本质，即$ f（q，t）= mq+bt $ and $ f（q，t）= m q^{n+1}+b t $，其中$ m $，$ b $，$ b $和$ n $是模型参数。我们已经使用了提出的减速参数，该参数可以预测宇宙的减速和加速阶段，并通过最近的观察结果进行过渡红移，并获得了能量密度（$ρ$）和压力（$ p $），以研究宇宙学模型的各种能量条件。本模型中的状态参数方程（$ω\ simeq -1 $）也支持宇宙的加速行为。在这两种情况下，根据当前的加速扩张，模型，零，弱和主要能量条件都违反了强大的能量条件。
The recently proposed $f(Q, T)$ gravity (Xu et al. Eur. Phys. J. C \textbf{79} (2019) 708) is an extension of the symmetric teleparallel gravity. The gravitational action $L$ is given by an arbitrary function $f$ of the non-metricity $Q$ and the trace of the matter-energy momentum tensor $T$. In this paper, we examined the essence of some well prompted forms of $f(Q,T)$ gravity models i.e. $f(Q,T)= mQ+bT$ and $f(Q,T)= m Q^{n+1}+b T$ where $m$, $b$, and $n$ are model parameters. We have used the proposed deceleration parameter, which predicts both decelerated and accelerated phases of the Universe, with the transition redshift by recent observations and obtains energy density ($ρ$) and pressure ($p$) to study the various energy conditions for cosmological models. The equation of state parameter ($ω\simeq -1$) in the present model also supports the accelerating behavior of the Universe. In both, the models, the null, weak, and dominant energy conditions are obeyed with violating strong energy conditions as per the present accelerated expansion.
