空间分布 p(x,t) V2(x) 0/2(n/0 v,(x,txu+u2(x,tx-12 1=∫4x(x)(x1)=」4xm1+ 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           − − =   = + = +         +        =         =   + −           