论文标题
采购曲率模式，具有熵扰动的非单明性弹跳宇宙学
Sourcing curvature modes with entropy perturbations in non-singular bouncing cosmologies
论文作者
论文摘要
宇宙微波背景中观察到的温度波动可以追溯到由绝热和/或熵物扰动来源的原始曲率模式。在本文中，我们在非单明性弹跳宇宙学的背景下探讨了熵机制。我们表明，曲率模式是在“优雅出口”期间自然产生的，即，平滑的缓慢收缩阶段末端并且宇宙进入跳动阶段。在这里，关键作用是由动能组件扮演的，这些动能成分占据了能量密度并推动进化向宇宙弹跳。
The observed temperature fluctuations in the cosmic microwave background can be traced back to primordial curvature modes that are sourced by adiabatic and/or entropic matter perturbations. In this paper, we explore the entropic mechanism in the context of non-singular bouncing cosmologies. We show that curvature modes are naturally generated during `graceful exit,' i.e., when the smoothing slow contraction phase ends and the universe enters the bounce stage. Here, the key role is played by the kinetic energy components that come to dominate the energy density and drive the evolution towards the cosmological bounce.
