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Condensed Matter Seminars

ics Condensed Matter
Thursday, March 3, 2005
4:00 PM
Physics Building, Room 204
Note special time.
Note special room.
Wenhui Li [Host: Tom Gallagher]
UVA
"Dipole-Dipole Excitation and Ionization in an Initially Frozen Rydberg Gas"
ABSTRACT:
In cold dense Rydberg atom samples, the dipole-dipole interaction strength is effectively resonant at the typical interatomic spacing in the sample, and the interaction has a 1/R3 dependence on interatomic spacing R. The dipole-dipole attraction leads to ionizing collisions of initially stationary atoms, which produces hot atoms and ions and initiates the evolution of initially cold samples of neutral Rydberg atoms into plasmas. More generally, the strong dipole-dipole forces lead to motion, which must be considered in proposed applications.

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