论文标题
标量扰动引起的标量扰动的分析解
Analytic solutions of scalar perturbations induced by scalar perturbations
论文作者
论文摘要
我们研究标量扰动引起的标量扰动，通过在扰动中以二阶出现的非线性相互作用引起的标量扰动。我们在完美的流体中得出了诱导标量扰动的分析溶液。特别是，我们考虑了以辐射为主时代和以物质为主时代的扰动。通过分析解决方案，我们还讨论了诱导的扰动的功率谱。
We study scalar perturbations induced by scalar perturbations through the non-linear interaction appearing at second order in perturbations. We derive analytic solutions of the induced scalar perturbations in a perfect fluid. In particular, we consider the perturbations in a radiation-dominated era and a matter-dominated era. With the analytic solutions, we also discuss the power spectra of the induced perturbations.
