简并完全未消除情形下的二级微扰公式

The Discussion of the Second Order Perturbation Formula When Degeneracy is not Removed Completely

本文从研究问题简便的角度 ,对能级的简并性利用分类的方法 ,把未受微扰时的能级分为简并能级与非简并能级 ,避免了解释态矢 | k>的麻烦 ,对一级近似下完全未消除情形下的二级修正公式得出了与文献 [1]一样的结论。

To study the problem conveniently,the article classifies the not perturbed energy level into degenerate and non-degenerate.Then it avoids the trouble of explaining ｜k> and gets the same revised formula of the second order as that of document[1],when approximation of the first order is not removed completely.