Rabi oscillations and excitation trapping in the coherent excitation of a mesoscopic frozen Rydberg gas

Details Rabi oscillations and excitation trapping in the coherent excitation of a mesoscopic frozen Rydberg gas Rabi oscillations and excitation trapping in the coherent excitation of a mesoscopic frozen Rydberg gas

2007-11-27

arxiv.org/abs/0711.4321v2

Physics

Atomic Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.100.253001

We demonstrate the coherent excitation of a mesoscopic ensemble of about 100 ultracold atoms to Rydberg states by driving Rabi oscillations from the atomic ground state. We employ a dedicated beam shaping and optical pumping scheme to compensate for the small transition matrix element. We study the excitation in a weakly interacting regime and in the regime of strong interactions. When increasing the interaction strength by pair state resonances we observe an increased excitation rate through coupling to high angular momentum states. This effect is in contrast to the proposed and previously observed interaction-induced suppression of excitation, the so-called dipole blockade.

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