Nonclassical photon pairs generated from a room-temperature atomic ensemble

Details Nonclassical photon pairs generated from a room-temperature atomic ensemble Nonclassical photon pairs generated from a room-temperature atomic ensemble

2003-09-24

arxiv.org/abs/quant-ph/0309175v3

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.69.043819

We report experimental generation of non-classically correlated photon pairs from collective emission in a room-temperature atomic vapor cell. The nonclassical feature of the emission is demonstrated by observing a violation of the Cauchy-Schwarz inequality. Each pair of correlated photons are separated by a controllable time delay up to 2 microseconds. This experiment demonstrates an important step towards the realization of the Duan-Lukin-Cirac-Zoller scheme for scalable long-distance quantum communication.

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