Nonclassical photon pairs generated from a room-temperature atomic ensemble

Abstract

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.

4 pages, 2 figures

References in corpus (11)

• Long-distance quantum communication with atomic ensembles and linear optics
• The Physical Implementation of Quantum Computation
• Storage of light in atomic vapor
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Experimental long-lived entanglement of two macroscopic objects
• Generation of Nonclassical Photon Pairs for Scalable Quantum Communication with Atomic Ensembles
• Quantum communication between atomic ensembles using coherent light
• Atomic Quantum State Teleportation and Swapping
• Three-dimensional theory for interaction between atomic ensembles and free-space light
• Mapping a quantum state of light onto a long-lived atomic spin state: towards quantum memory
• Entangling many atomic ensembles through laser manipulation

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