论文标题
带有空间曲率的Rastall模型的宇宙动力学和定性研究
Cosmic dynamics and qualitative study of Rastall model with spatial curvature
论文作者
论文摘要
我们研究了非平板弗里德曼·罗伯逊 - 沃克（FRW）时空的宇宙动力学的宇宙动力学。在这种情况下，我们关注满足状态仿射方程的模型类别。我们通过压缩流体得出Rastall模型的自主系统。我们应用派生系统来研究扩展和弹跳宇宙学及其稳定的性质和宇宙学特性的关键点。扩大的宇宙学在晚期产生了保姆宇宙，而过去的物质和辐射占据了阶段。对弹跳宇宙学的自主系统的研究在正空间曲率区域中产生振荡溶液。我们还通过使用能量条件来研究建立非单明世界模型的后果。与标准模型相比，已详细讨论了Rastall模型的不同特征。
We investigate the cosmic dynamics of Rastall gravity in non-flat Friedmann-Robertson-Walker (FRW) space-time with barotropic fluid. In this context, we are concerned about the class of model satisfying the affine equation of state. We derive the autonomous system for the Rastall model with barotropic fluid. We apply the derived system to investigate the critical points for expanding and bouncing cosmologies and their stable nature and cosmological properties. The expanding cosmology yields de Sitter universe at late times with decelerating past having matter and radiation dominated phases. Investigation of autonomous system for bouncing cosmology yields oscillating solutions in positive spatial curvature region. We also investigate the consequences of setting-up a model of non-singular universe by using energy conditions. The distinct features of the Rastall model compared to the standard model have been discussed in detail.
