论文标题
物质反弹场景在扩展的对称远程引力中
Matter Bounce Scenario in Extended Symmetric Teleparallel Gravity
论文作者
论文摘要
在本文中，我们在延伸的对称远程引力（q）重力中显示了宇宙的弹跳场景。从弹跳场景和循环量子宇宙学（LQC）的动机中，功能$ f（q）$的形式是在Friedmann-Lemaitre-Robertson Walker（FLRW）时空的背景下获得的。考虑到以灰尘流体为主的背景宇宙学，已经表达了E折叠参数，其中包含非赞誉项。由于弹跳上下文中的慢速滚动标准是无效的，因此我们使用F（Q）和标量扭曲模型之间的共形等效性在弹跳模型中应用自下而上的重建技术。已经通过相位空间分析研究了模型的动力学，在该分析中，稳定和不稳定的节点均可获得。同样，稳定性分析是用哈勃参数和物质能量密度的一阶标量扰动进行的，以验证模型的稳定性。
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.
