标题： 宇宙学扰动在霍恩德斯基引力的扭力类似物中 显示英文标题

标题： Cosmological Perturbations in the Teleparallel analog of Horndeski gravity

摘要： 在本工作中，我们研究了Bahamonde-Dialektopoulos-Levi Said (BDLS)理论中的宇宙学扰动，即Horndeski引力的扭力类似物。为了理解宇宙学模型中结构的演化，有必要不仅在背景上，而且在微扰层面上研究其宇宙学。Horndeski理论及其扭力类似物在文献中已被广泛分析，但为了对其进行定量研究，我们需要了解它们的宇宙学扰动。这就是为什么我们在这里研究该理论的标量-矢量-张量分解，并且还将所谓的alpha参数用该理论的任意函数表示，这些函数指定了与{\Lambda }CDM模型的偏差。我们已经探讨了作用量的二阶张量、矢量和标量扰动，这大大拓宽了在观测背景下对标量-张量理论参数空间搜索的新可能性。 显示英文摘要

摘要： In this work we study the cosmological perturbations in Bahamonde-Dialektopoulos-Levi Said (BDLS) theory, i.e. the teleparallel analog of Horndeski gravity. In order to understand the evolution of structure in a cosmological model, it is necessary to study its cosmology not only in the background but also perturbatively. Both Horndeski and its teleparallel analog have been analyzed a lot in the literature, but in order to study them quantitatively, we need to know their cosmological perturbations. That is why, we study here the scalar-vector-tensor decomposition of the theory and we also express the so-called alpha parameters in terms of the arbitrary functions of the theory, that designate the deviation from the {\Lambda}CDM model. We have explored tensor, vector and scalar perturbation of the action up to second order, which drastically opens up new possibilities on searches in the parameter space of scalar-tensor theories in the context of observations.