标题： 物质反弹情景在扩展对称平行引力中 显示英文标题

标题： Matter Bounce Scenario in Extended Symmetric Teleparallel Gravity

摘要： 在本文中，我们展示了在扩展对称平行引力（f(Q)引力）中的宇宙物质反弹情景。 受反弹情景和环量子宇宙学（LQC）的启发，函数$f(Q)$的形式在弗里德曼-勒梅特-罗伯逊-沃尔克（FLRW）时空背景下得到了确定。 考虑到由尘埃流体主导的背景宇宙学，已经表达了e折叠参数，该参数包含非度规项。 由于在反弹背景下慢滚准则不适用，我们利用f(Q)与标量-张量模型之间的共形等价性，将自下而上的重建技术应用于反弹模型中。 通过相空间分析研究了模型的动力学，得到了稳定和不稳定节点。 此外，通过哈勃参数和物质能量密度的一阶标量扰动进行了稳定性分析，以验证模型的稳定性。 显示英文摘要

摘要： In this paper, we have shown the matter bounce scenario of the Universe in an extended symmetric teleparallel gravity, the f(Q) gravity. Motivated from the bouncing scenario and loop quantum cosmology (LQC), the form of the function $f(Q)$ has been obtained at the backdrop of Friedmann-Lemaitre-Robertson Walker (FLRW) space time. Considering the background cosmology dominated by dust fluid, the e-folding parameter has been expressed, which contains the nonmetricity term. Since the slow roll criterion in the bouncing context is not valid, we used a conformal equivalence between f(Q) and scalar-tensor model to apply the bottom-up reconstruction technique in the bouncing model. The dynamics of the model has been studied through the phase space analysis, where both the stable and unstable nodes are obtained. Also, the stability analysis has been performed with the first order scalar perturbation of the Hubble parameter and matter energy density to verify the stability of the model.