论文标题
标量扭转中暗能的宇宙学动力$ f（t，ϕ）$重力
Cosmological dynamics of dark energy in scalar-torsion $f(T,ϕ)$ gravity
论文作者
论文摘要
已经研究了标量 - 扭转$ f（t，ϕ）$重力的宇宙学动力，其中$ t $是触发性重力的扭转标量，而$ ϕ $是一个规范的标量字段。在这种情况下，我们关注的是与重力和指数潜力非线性耦合的模型类别的现象学。我们获得了自主系统的临界点，以及每个人的稳定条件及其宇宙学特性。特别是，我们显示了具有加速膨胀的新吸引子的存在，以及新的缩放溶液，其中深色能量尺度作为背景流体密度的能量密度，从而定义了所谓的缩放辐射和缩放物质时期。缩放解决方案是马鞍点，因此，系统将这些解决方案从当前的宇宙加速度时代退出，向描述了以黑暗能量为主时代的吸引人点。
It is investigated the cosmological dynamics of scalar-torsion $f(T,ϕ)$ gravity as a dark energy model, where $T$ is the torsion scalar of teleparallel gravity and $ϕ$ is a canonical scalar field. In this context, we are concerned with the phenomenology of the class of models with non-linear coupling to gravity and exponential potential. We obtain the critical points of the autonomous system, along with the stability conditions of each one of them and their cosmological properties. Particularly, we show the existence of new attractors with accelerated expansion, as well as, new scaling solutions in which the energy density of dark energy scales as the background fluid density, thus, defining the so-called scaling radiation and scaling matter epochs. The scaling solutions are saddle points, and therefore, the system exits these solutions to the current epoch of cosmic acceleration, towards an attractor point describing the dark energy-dominated era.
