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In the harmonic oscillator problem, the normalized wave functions for the ground and first excited states...

In the harmonic oscillator problem, the normalized wave functions for the ground and first excited states are ψ0 and ψ1. Using these functions, at some point t, a wave function u = Aψ0 + Bψ1 is constructed, where A and B are real numbers.
(a) Show that the average value of x in the u state is generally non-zero.

(b) What condition A and B must satisfy if we want the function u to be normalized?

(c) For which values ​​of the constants A and B do we get the maximum and for which minimum of <x>?


The result:

(b) A2 + B2 = 1
(c) Maximum: A = B = 2−1/2

Solutions

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