论文标题
从弹跳过渡到$ r^2 $通货膨胀
Transitioning from a bounce to $R^2$ inflation
论文作者
论文摘要
非单明一角的弹跳宇宙学是早期宇宙动机的模型。最近的观察数据与正空间曲率一致，并允许在早期宇宙中自然崩溃和弹跳阶段。 Additionally, bouncing cosmologies have the potential to rectify conceptual shortcomings identified in the theory of inflation, such as the singularity problem.在本文中，我们在修改后的重力中提出了一个经典的弹跳模型，包括$ r^2 $ - 项。我们表明，弹跳后，宇宙自然进入了一段通货膨胀，这是由$ r^2 $ - 术语驱动的。我们分析了模型的稳定性，并发现标量有助于模型的稳定性。
Non-singular bouncing cosmologies are well--motivated models for the early universe. Recent observational data are consistent with positive spatial curvature and allow for a natural collapsing and bouncing phase in the very early universe. Additionally, bouncing cosmologies have the potential to rectify conceptual shortcomings identified in the theory of inflation, such as the singularity problem. In this paper we present a classical bouncing model in the context of modified gravity, including an $R^2$-term in the action. We show that after the bounce, the universe enters naturally a period of inflation, driven by the $R^2$--term. We analyse the stability of the model and find that the scalaron assists the stability of the model.
