D=∫p*(p)po(p)dp =(2πh){[p(p]p∫w(x)erdx ]}dp =(2πh)v2∫{[p(p)pved]}dp =(2)∫o(p汤y9 dxdp =(2π)2∫{p(pe(-ih w)dhdp E -(2)-V2[(p)edp-in --vww    ( ) ( )d  p p p p p {[ ( )] [ ]}d     p p p 1/ 2 / (2 ) {[ ( )][ e d ]}d ipx          p p x p / 1/ 2 (e ) (2 ) {[ ( )][ d ]}d ipx i x            p x p 1/ 2 / (2 ) {[ ( )][ ( )d ]}d ipx e i x             p x p 1/ 2 / (2 ) [ ( )e d ]( )d ipx i x             p p x 1/ 2 / (2 ) ( )e d ipx   x    x ( )d i x         x   ˆ d    p x