论文标题
S-Brane Ekpyrosis的宇宙学扰动的纠缠熵
Entanglement entropy of cosmological perturbations for S-brane Ekpyrosis
论文作者
论文摘要
我们计算了由于在任何规范耦合的单场ekpyrosis中存在的引力非线性引起的标量扰动的纠缠熵。具体而言，我们专注于最新改进的ekpyprosis模型，该模型能够产生曲率扰动和重力波的量表不变的功率谱，以及由于ekpyrotic收缩末端的S-Brane引起的非单星反弹。通过要求将纠缠熵雷姆安人亚基与重新加热过程中产生的热熵相比，我们在反弹的能量尺度上获得了上限。
We calculate the entanglement entropy of scalar perturbations due to gravitational non-linearities present in any model of canonically-coupled, single-field ekpyrosis. Specifically, we focus on a recent model of improved ekpyrosis which is able to generate a scale-invariant power spectrum of curvature perturbations and gravitational waves as well as have a non-singular bounce due to an S-brane at the end of ekpyrotic contraction. By requiring that the entanglement entropy remians subdominant to the thermal entropy produced during reheating, we get an upper bound on the energy scale of the bounce.
