Observation of the Stark-tuned Forster resonance between two Rydberg atoms

Abstract

Cold atoms in highly excited Rydberg states are promising candidates to implement quantum logic gates of a quantum computer via long-range dipole-dipole interaction. Two-qubit gates require a controlled interaction of only two close Rydberg atoms. We report on the first spectroscopic observation of the resonant dipole-dipole interaction between two cold rubidium Rydberg atoms confined in a small laser excitation volume. The interaction strength was controlled by fine-tuning of the Rydberg levels into a Forster resonance using the Stark effect. The observed resonance line shapes are in good agreement with numerical Monte Carlo simulations.

4 pages, 3 figures, shorter version and references updated in v2

References in corpus (7)

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