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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