论文标题
$ f（q）$重力中的线性宇宙学扰动
Linear Cosmological perturbations in $f(Q)$ Gravity
论文作者
论文摘要
在此手稿中，我们研究了宇宙的加速扩展历史以及使用$ f（q）$重力模型的大规模结构的形成。距离模量和红移内的宇宙的膨胀率已在$ f（q）$重力中进行。这项工作还致力于研究使用$ 1 + 3 $协变形式主义的$ f（q）$重力模型中的线性宇宙扰动。标量和谐波分解技术用于找到进化方程。物质密度对比的增长用红移$ z $分析。使用非赞成度修改的重力模型，即$ f（q）= q+αq^n $，已经解释了加速扩展的宇宙和大规模结构的地层。准静态近似技术用于分析物质对比的生长。在存在非型重力的情况下，研究了密度对比度的生长在灰尘和辐射主导的宇宙中。
In this manuscript, we studied the accelerated expansion history of the universe and the formations of large-scale structures using $f(Q)$ gravity model. The expansion rate of the universe within distance modulus and redshift has been performed in $f(Q)$ gravity. This work is also devoted to investigating the linear cosmological perturbations in the $f(Q)$ gravity model using the $1 + 3$ covariant formalism. The scalar and harmonic decomposition techniques are applied to find the evolution equation. The growth of matter density contrasts is analyzed with redshift $z$. Using the nonmetricity modified gravity model which is $f (Q) = Q+αQ^n$, the accelerating expanding universe and the formations of the large-scale structures have been explained. The quasi-static approximation technique is applied to analyze the growth of matter contrasts. The growth of density contrast is studied within the dust and radiation-dominated universe in the presence of nonmetricity gravity.
