Quantum telecommunication based on atomic cascade transitions

Details Quantum telecommunication based on atomic cascade transitions Quantum telecommunication based on atomic cascade transitions

2006-01-10

arxiv.org/abs/quant-ph/0601055v1

Physical Review Letters 96, 093604 (2006)

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.093604

A quantum repeater at telecommunications wavelengths with long-lived atomic memory is proposed, and its critical elements are experimentally demonstrated using a cold atomic ensemble. Via atomic cascade emission, an entangled pair of 1530 nm and 780 nm photons is generated. The former is ideal for long-distance quantum communication, and the latter is naturally suited for mapping to a long-lived atomic memory. Together with our previous demonstration of photonic-to-atomic qubit conversion, both of the essential elements for the proposed telecommunications quantum repeater have now been realized.

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