论文标题
观察受到限制的加速宇宙学模型，具有较高的非金属和平方迹线的功率
Observationally constrained accelerating cosmological model with higher power of non-metricity and squared trace
论文作者
论文摘要
在本文中，宇宙的宇宙学模型以$ f（q，t）$重力呈现，并且参数受宇宙学数据集的约束。最初，$ f（q，t）$模型的广义形式用作$ f（q，t）=-λ_{1} q^{m}-mλ_{2} t^2 $，其中$λ_{1} $，$λ_{2} $ {2} $和$ m $是模型参数。通过一些代数操作，可以根据红移获得哈勃参数。然后，使用MCMC分析，使用最新的哈勃和万神殿$^{+} $数据来约束模型参数。还通过BAO数据集验证了模型参数。该模型显示了早期减速过渡到宇宙的加速阶段。 $ OM（Z）$诊断表明一个正斜率，有利于该模型处于幻影字段主导的阶段。
In this paper, a cosmological model of the Universe is presented in $f(Q,T)$ gravity and the parameters are constrained by cosmological data sets. Initially, a generalised form of $f(Q,T)$ model is used as $f(Q,T)=-λ_{1} Q^{m}-λ_{2} T^2$, where $λ_{1}$, $λ_{2}$ and $m$ are model parameters. With some algebraic manipulation, the Hubble parameter is obtained in terms of redshift. Then, using MCMC analysis, the model parameters are constrained using the most current Hubble and Pantheon$^{+}$ data. The model parameters are also verified through the BAO data set. The model shows an early deceleration transitioning to an accelerating phase of the Universe. The $Om(z)$ diagnostics indicate a positive slope, favouring the model to be in a phantom field dominated phase.
