标题： inflation 和 宇宙扰动的起源 显示英文标题

标题： Inflation and Birth of Cosmological Perturbations

摘要： 我们回顾了关于从膨胀产生的宇宙扰动的理论近期发展。 在简要介绍标准单场慢滚膨胀以及由此产生的曲率和张量扰动之后，我们讨论了其他膨胀模型中非线性非高斯扰动的可能来源。 然后我们描述了所谓的$\delta N$形式主义，这是一种评估超哈勃尺度非线性曲率扰动的强大工具。 显示英文摘要

摘要： We review recent developments in the theory of inflation and cosmological perturbations produced from inflation. After a brief introduction of the standard, single-field slow-roll inflation, and the curvature and tensor perturbations produced from it, we discuss possible sources of nonlinear, non-Gaussian perturbations in other models of inflation. Then we describe the so-called $\delta N$ formalism, which is a powerful tool for evaluating nonlinear curvature perturbations on super Hubble scales.