Nonclassical photon pairs generated from a room-temperature atomic ensemble
- 28 April 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 69 (4), 043819-117
- https://doi.org/10.1103/physreva.69.043819
Abstract
We report experimental generation of nonclassically 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 is separated by a controllable time delay up to . 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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