Nondispersing wave packets.
We have formed nondispersing wave packets from atomic Li Rydberg eigenstates by adding a small microwave field approximately resonant with the Deltan=1 transition. The orbital motion of the Rydberg electron in states of 70<or=n<or=78 becomes phase locked to a 17.5 GHz microwave field and remains so for 900 ns, roughly 15 000 orbits of the Rydberg electron. A Floquet approach provides a reasonable quantum-mechanical description.
Maeda
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Department of Physics, University of Virginia, Charlottesville, Virginia 22904-0714, USA.
Gallagher
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