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本文研究了一个多能级系统的量子干涉效应，该能级中三个相邻分离上能级通过一相干驱动场与一个低能级耦合，同时通过真空模与另一低能级耦合。推导出该系统发生量子干涉效应的条件、能级布居对驱动场频率的依赖关系和自发辐射光谱，描述了与具有两个相邻分离上能级的能级系统所不相同的关于自发辐射相涨、相消现象以及布居数捕获现象的特征。
In this paper, we investigate the quantum interference effect of a multi-level system in which three adjacent upper energy levels are coupled to a low energy level through a coherent driving field and to another low energy level through a vacuum mode. The conditions of quantum interference effect of this system are deduced. The dependence of the energy level on the driving field frequency and the spontaneous emission spectrum are deduced. The differences between the spontaneous emission and the energy level of the system with two adjacent upper energy levels are described. Phase up, the phenomenon of cancellation and the number of capture phenomenon characteristics.