Demonstration of a Stable Atom-Photon Entanglement Source for Quantum Repeaters

Journal Article · Fri Nov 02 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.180505· OSTI ID:21024373

Shuai, Chen; Yuao, Chen; Bo, Zhao ^[1]; Zhensheng, Yuan; Jianwei, Pan ^[1]; Schmiedmayer, Joerg ^[2]

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1. Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Philosophenweg 12, 69120 Heidelberg (Germany)
2. Atominstitut der oesterreichischen Universitaeten, TU-Wien, A-1020 Vienna Austria (Austria)

We demonstrate a novel way to efficiently create a robust entanglement between an atomic and a photonic qubit. A single laser beam is used to excite one atomic ensemble and two different modes of Raman fields are collected to generate the atom-photon entanglement. With the help of built-in quantum memory, the entanglement still exists after 20.5 {mu}s storage time which is further proved by the violation of Clauser-Horne-Shimony-Holt type Bell's inequality. The entanglement procedure can serve as a building block for a novel robust quantum repeater architecture [Zhao et al., Phys. Rev. Lett. 98, 240502 (2007)] and can be extended to generate high-dimensional atom-photon entanglements.

• OSTI ID: 21024373
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BELL THEOREM
PHOTONS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS