Local Blockade of Rydberg Excitation in an Ultracold Gas

Abstract

In the laser excitation of ultracold atoms to Rydberg states, we observe a dramatic suppression caused by van der Waals interactions. This behavior is interpreted as a local excitation blockade: Rydberg atoms strongly inhibit excitation of their neighbors. We measure suppression, relative to isolated atom excitation, by up to a factor of 6.4. The dependence of this suppression on both laser irradiance and atomic density are in good agreement with a mean-field model. These results are an important step towards using ultracold Rydberg atoms in quantum information processing.

4 pages, 3 figures

References in corpus (5)

• Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles
• Fast quantum gates for neutral atoms
• Engineering single atom and single photon sources from entangled atomic ensembles
• Macrodimers: ultralong range Rydberg molecules
• Photoionization of ultracold and Bose-Einstein condensed Rb atoms

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