Physics – Atomic Physics
Scientific paper
2012-01-30
Physics
Atomic Physics
Scientific paper
We report on experiments exploring Stark-tuned F\"orster resonances between Rydberg atoms with unprecedented resolution in the F\"orster defect. The individual resonances are expected to exhibit different angular dependencies, opening the possibility to tune not only the interaction strength but also the angular dependence of the pair state potentials by an external electric field. We achieve a high resolution by optical Ramsey interferometry for Rydberg atoms combined with electric field pulses. The resonances are detected by a loss of visibility in the Ramsey fringes due to resonances in the interaction. We present measurements of the density dependence as well as of the coherence time at and close to F\"orster resonances.
Balewski Jonathan B.
Butscher Bjoern
Krupp A. T.
Löw Robert
Nipper Johannes
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