产生量子相干有很多种方法，其中自发辐射诱导相干就是一种比较重要的方法。

There are many ways to produce quantum coherent control, in which spontaneously induced coherence is an important one.

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第二章给出了自发辐射诱导相干影响下的近等间隔的阶梯型三能级系统模型及其密度算符的运动方程的具体推导。

In chapter 2, we gave the nearly equispaced Ladder-type system model and the density-matrix equations in a rotating frame after taking the effects of spontaneously induced coherence into account.

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