方法采用能级交叉技术和缀饰态理论。
Methods Level-crossing technique and dressed states theory are used.
研究了简并四波混频的能级交叉效应，并与共振荧光的能级交叉效应比较。
We have studied the level crossing effect in degenerate four-wave mixing and compared it with the level crossing effect in resonance fluorescence.
我们发现在有能级交叉的有限大尺寸系统中，约化保真度是一个测量量子相变的有效工具。
We find the reduced fidelity is an effective tool in detecting the quantum phase transitions associated with level crossings for the finite-size systems.
计算结果表明，系统准能级随交变电场振幅的变化出现一系列严格交叉和回避交叉。
The calculation shows that the quasi-energy levels versus the amplitude of the external field undergo a series of exact-crossing and avoid-crossing.
在研究经典混沌系统的量子能级随某一参数变化时，人们观察到了大量的“能级回避交叉”，这种现象很可能是量子混沌的一个重要标志。
When observing energy level of a chaotic system changing with one of the parameter, there are many avoided crossing, which possibly is an important sign of quantum chaos.
在研究经典混沌系统的量子能级随某一参数变化时，人们观察到了大量的“能级回避交叉”，这种现象很可能是量子混沌的一个重要标志。
When observing energy level of a chaotic system changing with one of the parameter, there are many avoided crossing, which possibly is an important sign of quantum chaos.
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