《量子力学》课程教学资源（PPT课件讲稿）第四章 量子力学的应用 4.4 自旋和角动量

y=axu2+bx 1/2 几率2 d+|b2=1 P(+)=P(个)=P(1/2)=a1 P(-)=P()=P(-1/2)

一般 ◼ 几率  = a1/ 2 + b −1/ 2 2 2 2 2 ( ) ( ) ( 1/ 2) ( ) ( ) (1/ 2) 1 P P P b P P P a a b − =  = − = + =  = = + =

空间分布 V1(x) 0 p(x, t) 2(1))(,D)+v2(x,1 v1(x,D)12+v2(x,D)12 1=Jdx(;1)甲(,1)=∫d2xm+ vil--probability density of finding ptcl at x with spin up(time t

空间分布 ( ) 1 ( , ) ( , ) ( ) ( , ) ( , ) 1 0 ( , ) 0 1 ( , ) ( ) ( ) ( , ) 2 1 2 2 2 1 3 3 1 1/ 2 2 1/ 2 1 2 2 1 ptcl at x with spin up time t probability density of finding d x x t x t d x x t x t x t x t x x x t           − − =   = + = +         +        =         =   + −           