封闭三能级系统的等价类
Equivalent classes of closed three-level systems
摘要：
近年来，量子光学的大量研究致力于分析原子三能级系统，并且对于许多物理量，已经预测了不同配置的相同效果。这些配置基本上可以分为两类。一个是系统包含一个亚稳态，另一个是系统有两个紧密的水平和相干效应变得重要。我们证明了在很宽的参数范围内，这两个类实际上对许多重要的物理量是等价的。一个统一的图片基础上的大量的工作，这些类别的原子三能级系统，并应用到一些例子。
英文摘要：
In recent years a significant amount of research in quantum optics has been devoted to the analysis of atomic three-level systems and for many physical quantities the same effects have been predicted for different configurations. These configurations can be split into essentially two classes. One for which the system contains a metastable state and another where the system has two close-lying levels and coherence effects become important. We demonstrate when and why for a wide range of parameters these two classes are in fact equivalent for many important physical quantities. A unified picture underlying a large body of work on these categories of atomic three-level systems is presented and applied to some examples.
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