Classical periodic motion of atomic-electron wave packets
John A. Yeazell, Mark Mallalieu, Jonathan Parker, and C. R. Stroud, Jr.
Phys. Rev. A 40, 5040 (1989).
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An experiment is described in which a coherent superposition of the Rydberg
states of atomic potassium is excited by a short optical pulse. The
coherent superposition forms a wave packet localized in the radial
coordinate. The radial motion of the wave packet is periodic with the
period of the classical Kepler orbit. The time evolution is probed by a
second short pulse. The resulting photoionization signal, as a function of
the delay between pulses, shows the classical periodicity.
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