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b) (6 pts)

Give an alternate proof either to the statement in part a).

Hint: The following approaches will work: 1) the direct approach (take the time derivative and apply the time dependent Schrödinger equation), 2) the general form of Ehrenfest's theorem (see formula sheet), 3) the continuity equation with the probability current (see formula sheet).



Prof. Tomas Alberto Arias
Thu Oct 12 19:27:26 EDT 1995