用非线性李代数方法 ，对关于角动量的阶梯算符进行了研究。
Using the method of nonlinear Lie algebra, the tensors of ladder operators are obtained.
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.
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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