Analytical investigation of revival phenomena in the finite square-well potential
David L. Aronstein and C. R. Stroud, Jr.
Phys. Rev. A 62, 022102 (2000).
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We present an analytical investigation of revival phenomena in the finite
square-well potential. The classical motion, revival, and super-revival
time scales are derived exactly for wave packets excited in the finite
well. These time scales exhibit a richer dependence on wave-packet energy
and on potential-well depth than has been found in other quantum systems:
They explain, for example, the difficulties in exciting wave packets with
strong classical features at the bottom of a finite well, or with clearly
resolved super-revivals in a shallow well. In the proper regions of
validity, the time scales predict the instances of wave-packet reformation
extremely accurately. Revivals at the bottom of the well are explored as a
"universal" limit of the general theory, which offers the clearest
connection with the series of fractional and full revivals seen in the
dynamics of the infinite square-well potential.
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