《量子力学》课程PPT教学课件：第五章 近似方法

非简并微扰 ■最简单情形 En≠En扩m≠n Suppose system is in state o before perturbation 0) mk E(0) k

非简并微扰 ◼ 最简单情形 k m m k k m n E c before perturbation Suppose system is in state if m n      = =    (0) (0)

阶修正 +e (0)(1) cm)=2 (0) n nin n ∑ C+ (1)(O) )=0 k mk m≠k

一阶修正 m k w c E W c c c c E c E c c W c k m m k m kk m m m m m n m m m m n m n  − = = + = + − =   , ( * * ) 0 : (1) (1) (0) (1) (1) (0) (1) (0) (0) (1) (1) (0) 1    