论文标题
$ f（q，t）$具有观察性约束的重力模型
$f(Q,T)$ gravity models with observational constraints
论文作者
论文摘要
该论文在$ f（q，t）$重力中介绍了较晚的宇宙学，而黑暗能量本质上纯粹是几何。我们首先采用一个积极进取的$ f（q，t）$重力模型，$ f（q，t）= mq^{n}+bt $，其中$ m，n $和$ b $是模型参数。此外，我们还假设宇宙由无压力的物质主导，该物质产生了$％a（t）= c_ {2}的功率定律类型比例因子（at+c_ {1}）^{\ frac {\ frac {1} {a} {a} {a}} $ $ c_ {1} $ \＆$ c_ {2} $只是集成常数。为了研究模型的宇宙学生存能力，对模型参数的约束是从更新的57点哈勃数据集和联合2.1汇编超新星数据集中施加的。我们已经彻底调查了$ f（q，t）= mq^{n}+bt $的参数化的几何暗能的性质，并在$ \ {s，r \} $和$ \ {q，q，r \} $ planes use $ om om $ $ $ $ $ -DIANOSTICIASTICIASTICIASTICIASTICENSTICENSTICENSTICE diarost intatefinder Diagnostic的帮助下。目前的分析清楚地表明，$ f（q，t）$重力可以有望解决当前的宇宙加速度，因此可以替代黑暗能源问题。因此，鼓励在其他宇宙学区域进行进一步的研究，以进一步研究$ f（q，t）$重力的生存能力。
The paper presents late time cosmology in $f(Q,T)$ gravity where the dark energy is purely geometric in nature. We start by employing a well motivated $f(Q,T)$ gravity model, $f(Q,T)=mQ^{n}+bT$ where $m,n$ and $b$ are model parameters. Additionally we also assume the universe to be dominated by pressure-less matter which yields a power law type scale factor of the form $% a(t)=c_{2}(At+c_{1})^{\frac{1}{A}}$, where $A=\dfrac{3(8π+b)}{n(16π+3b)% }$ and $c_{1}$ \& $c_{2}$ are just integration constants. To investigate the cosmological viability of the model, constraints on the model parameters were imposed from the updated 57 points of Hubble data sets and 580 points of union 2.1 compilation supernovae data sets. We have thoroughly investigated the nature of geometrical dark energy mimicked by the parametrization of $f(Q,T)=mQ^{n}+bT$ with the assistance of statefinder diagnostic in $\{s,r\}$ and $\{q,r\}$ planes and also performed the $Om$ -diagnostic analysis. The present analysis makes it clear-cut that $f(Q,T)$ gravity can be promising in addressing the current cosmic acceleration and therefore a suitable alternative to the dark energy problem. Further studies in other cosmological areas are therefore encouraging to further investigate the viability of $f(Q,T)$ gravity.
