We argue for greater use of the no-dispersion approximation in introductory courses on quantum mechanics for the following two basic reasons: (i) the approximation yields in many situations a simple serniclassical picture of the time development of localized wavepackets; (ii) it makes explicit the fundamental importance of phase relations in the quantum model.
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© 1972 American Association of Physics Teachers.
1972
American Association of Physics Teachers
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