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Efficient retrieval of a single excitation stored in an atomic ensemble

Julien Laurat·Hugues de Riedmatten·Daniel Felinto·Chin-wen Chou·Erik Schomburg·H. Jeff Kimble
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Abstract

We report significant improvements in the retrieval efficiency of a single excitation stored in an atomic ensemble and in the subsequent generation of strongly correlated pairs of photons. A 50% probability to transform the stored excitation into one photon in a well-defined spatio-temporal mode at the output of the ensemble is demonstrated. These improvements are illustrated by the generation of high-quality heralded single photons with a suppression of the two-photon component below 1% of the value for a coherent state. A broad characterization of our system is performed for different parameters in order to provide input for the future design of realistic quantum networks.

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Julien Laurat, Hugues de Riedmatten, Daniel Felinto, Chin-wen Chou, Erik Schomburg, H. Jeff Kimble. 2006-07-05. Efficient retrieval of a single excitation stored in an atomic ensemble. https://doi.org/10.1364/oe.14.006912

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