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Quantum state transfer between matter and light

By D. N. Matsukevich and A. Kuzmich


We report on the coherent quantum state transfer from a two-level atomic system to a single photon. Entanglement between a single photon (signal) and a two-component ensemble of cold rubidium atoms is used to project the quantum memory element (the atomic ensemble) onto any desired state by measuring the signal in a suitable basis. The atomic qubit is read out by stimulating directional emission of a single photon (idler) from the (entangled) collective state of the ensemble. Faithful atomic memory preparation and read-out are verified by the observed correlations between the signal and the idler photons. These results enable implementation of distributed quantum networking

Year: 2004
DOI identifier: 10.1126/science.1103346
OAI identifier: oai:CiteSeerX.psu:
Provided by: CiteSeerX
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