Back and forth transfer and coherent coupling in a cold Rydberg dipole gas

Details Back and forth transfer and coherent coupling in a cold Rydberg dipole gas Back and forth transfer and coherent coupling in a cold Rydberg dipole gas

2005-04-04

arxiv.org/abs/physics/0504022v2

Phys. Rev. Lett. 96, 023202 (2006)

Physics

Atomic Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.95.233002

Coupling by the resonant dipole-dipole energy transfer between cold cesium Rydberg atoms is investigated using time-resolved narrow-band de-excitation spectroscopy. This technique combines the advantage of efficient Rydberg excitation with high-resolution spectroscopy at variable interaction times. The coherent character of the process is studied by back and forth transfer in the np+np <--> ns+(n+1)s reaction. Decoherence in the ensemble has two different origins: the atom motion induced by dipole-dipole interaction and the migration of the s-Rydberg excitation in the environment of p-Rydberg atoms.

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