标题： 用量子光激发 II. 激发一个两能级系统 显示英文标题

标题： Exciting with Quantum Light. II. Exciting a two-level system

摘要： 我们研究了量子光对两能级系统（2LS）的激发，从而将我们之前的研究（见本系列的第一部分）推向了一个本身具有量子特性的目标。尽管与用经典光驱动相比，目标量子态没有增益，但其动力学特性，如反聚束效应，可以得到改善。我们提出了一条由多个两能级系统组成的链子，即将每个2LS的发射作为下一个系统的驱动源，作为一种提供更好单光子源的方案。从基础层面来看，我们讨论了源与目标之间强耦合的概念以及不同类型的驱动光所引发的Mollow三重峰的不同版本。我们还讨论了激光散射光中反聚束光子的海德效应。 显示英文摘要

摘要： We study the excitation of a two-level system (2LS) by quantum light, thereby bringing our previous studies~(see part~I. of this series) to a target that is quantum itself. While there is no gain for the quantum state of the target as compared to driving it with classical light, its dynamical features, such as antibunching, can be improved. We propose a chain of two-level systems, i.e., setting the emission of each 2LS as the driving source of the following one, as an arrangement to provide better single-photon sources. At a fundamental level, we discuss the notion of strong-coupling between quantum light from a source and its target, and the several versions of the Mollow triplet that follow from various types of driving light. We discuss the Heitler effect of antibunched photons from the scattered light off a laser.