而散射算符对准粒子态的矩阵元同相应的单粒子态的矩阵元完全一样。

The scattering matrix elements for the quasi particle are the same as those of the single particle.

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我们介绍了一些常用的数值模拟方法，包括含时有限差分法、劈裂算符法、不含时散射矩阵法等。

We present some usual numerical methods including Finite-Difference method, Split-Operator method and Time-independent-Scattering-Matrix etc.

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