Efficient retrieval of a single excitation stored in an atomic ensemble

Details Efficient retrieval of a single excitation stored in an atomic ensemble Efficient retrieval of a single excitation stored in an atomic ensemble

2006-05-15

arxiv.org/abs/quant-ph/0605122v2

Opt. Express 14, 6912-6918 (2006)

Physics

Quantum Physics

Scientific paper

10.1364/OE.14.006912

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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