论文标题
粘性$ f（t，\ mathcal {t}）$重力的观测约束和稳定性
Observational constraints and stability in viscous $f(T,\mathcal{T})$ gravity
论文作者
论文摘要
在本文中，我们研究了$ f（t，\ mathcal {t}）$重力模型，该模型是在平面限制度量的散装粘度的情况下。场方程是通过用tetrad场的远程重力获得的。宇宙组件被视为物质和暗能量，黑暗能量组件与粘性$ f（t，\ m rathcal {t}）$重力相关联。计算弗里德曼方程后，我们根据红移参数获得了深度密度，压力和EOS的EOS。之后，我们绘制相应的宇宙学参数与红移参数，并检查宇宙的加速膨胀。最后，我们通过称为速度声音参数的函数探索系统稳定性。
In this paper, we study the $f(T,\mathcal{T})$ gravity model in the presence of the bulk viscosity by the flat-FRW metric. The field equation is obtained by teleparallel gravity with tetrad field. The universe components are considered as matter and dark energy which the dark energy component associates from the viscous $f(T,\mathcal{T})$ gravity. After calculating the Friedmann equations, we obtain the energy density, the pressure and the EoS of dark energy in terms of the redshift parameter. Afterward, we plot the corresponding cosmological parameters versus the redshift parameter and examine the accelerated expansion of the universe. In the end, we explore the system stability by a function called the speed sound parameter.
