Local Blockade of Rydberg Excitation in an Ultracold Gas

Details Local Blockade of Rydberg Excitation in an Ultracold Gas Local Blockade of Rydberg Excitation in an Ultracold Gas

2004-02-21

arxiv.org/abs/physics/0402113v1

Physics

Atomic Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.063001

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.

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