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利用Ｒａｍｓｅｙ场以及在大失谐情况下的二能级原子与光场的色散作用可以制备光场的Ｅｉｎｓｔｅｉｎ－Ｐｏｄｏｌｓｋｙ－Ｒｏｓｅｎ（ＥＰＲ）态和多光场的纠缠态．得出这些量子态之间的距离最大并且具有最大纠缠度和最大冯诺依曼熵．最后指出这些态在量子信息光学中的应用
The Einstein-Podolsky-Rosen (EPR) state and the multi-light-state entangled states of a light field can be prepared using the Ramsey field and the dispersion of two-level atoms and the field in a large detuning situation. It is found that the distance between these quantum states is the largest and has the maximum entanglement and the maximum von Neumann entropy. Finally, we point out the application of these states in quantum information optics