封闭三能级系统的不等式类
Inequivalent classes of closed three-level systems
摘要：
本文证明了三能级原子系统的$Λ$和V组态，而最近的研究表明，在经典场驱动下，它们对许多重要的物理量是等价的[M. B. Plenio，Phys.Rev.A \textbf{62}，015802（2000）]，当通过量子场耦合时不再等价。我们分析了这种行为的物理起源，并展示了这两种配置之间的等价性出现在半经典极限。
英文摘要：
We show here that the $Λ$ and V configurations of three-level atomic systems, while they have recently been shown to be equivalent for many important physical quantities when driven with classical fields [M. B. Plenio, Phys. Rev. A \textbf{62}, 015802 (2000)], are no longer equivalent when coupled via a quantum field. We analyze the physical origin of such behavior and show how the equivalence between these two configurations emerges in the semiclassical limit.
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