用相干态方法研究了与辐射相互作用的超辐射激光二能级系统的弛豫，给出在光场高温和低温两种极限情况下准几率密度函数方程的解。

This paper studies the relaxation in the two—Level system of the Laser superradiation interacted with radiation by the method of coherence, and gives the solution of light field about sgn.

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进而又研究了单链高分子的弛豫过程，给出了末端距向量自相关函数的弛豫时间。

Furthermore, the author also studied the relaxation of single polymer chain and obtained the relaxation time of the autocorrelation function of the end-to-end vector.

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