简并能级高阶微扰修正与严格解

Higher Order Perturbation Correction of Degenerate Energy Level and Its Exact Solution

通过一个在一阶修正中简并部分解除的例，利用表象变换方法，给出前三阶微扰修正的结果，与严格解的级数展开式比较，两者结果是一致的。同时表明在一阶修正中分裂出来的简并态，作为中间态是如何在高阶（ｎ≥３）修正中提供贡献的。

By using the method of representation transformation,the result of the perturbation correction to three order is given from an example in which the degeneration is partly lifted after the one order perturbation correction.This result is in good agreement with the result of the exact solution in seriees expansion.The contribution of the intermediate degenerate state of the one order perturbation correction,which comes from the split of the original degenerate state,to the result of higher order perturbation correction is also indicated in the comparison.