Recent content by scottyavh

  1. S

    Expected value for momentum and x, intro to quantum mechanics.

    Homework Statement Consider first a free particle (Potential energy zero everywhere). When the particle at a given time is prepared in a state ψ (x) it has <x> = 0 and <p> = 0. The particle is now prepared in Ψ (x, t = 0) = ψ (x) exp (ikx) Give <p> at time t = 0. It can be shown that in...