论文标题
平方扭转$ f（t，\ mathcal {t}）$重力及其宇宙学含义
Squared torsion $f(T,\mathcal{T})$ gravity and its cosmological implications
论文作者
论文摘要
我们介绍了扭转标量$ t $的耦合以及能量量张量$ \ MATHCAL {T} $的痕迹，该{T} $，它产生了新的修改后的$ f（t，\ mathcal {t}）$ gravity。此外，我们考虑了功能性形式$ f（t，\ nathcal {t}）=α\ Mathcal {t}+βt^2 $，其中$α$和$β$是免费参数。作为宇宙常数的替代方案，$ f（t，\ mathcal {t}）$理论可以提供对延迟加速的理论解释。详细应用了对被考虑模型的最新观察数据，尤其是模型参数的界限。此外，我们分析了减速，状态的有效方程和状态参数的总方程的宇宙学行为。但是，可以看出，减速参数描述了从减速到加速度的过渡，有效的黑暗扇区显示出类似典型的进化。
We present the coupling of the torsion scalar $T$ and the trace of energy-momentum tensor $\mathcal{T}$, which produces new modified $f(T,\mathcal{T})$ gravity. Moreover, we consider the functional form $f(T,\mathcal{T}) =α\mathcal{T}+βT^2$ where $α$ and $β$ are free parameters. As an alternative to a cosmological constant, the $f(T,\mathcal{T})$ theory may offer a theoretical explanation of the late-time acceleration. The recent observational data to the considered model especially the bounds on model parameters is applied in detail. Furthermore, we analyze the cosmological behavior of the deceleration, effective equation of state and total equation of state parameters. However, it is seen that the deceleration parameter depicts the transition from deceleration to acceleration and the effective dark sector shows a quintessence-like evolution.
