Demonstration of a stable atom-photon entanglement source for quantum repeaters

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 m...

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Bibliographic Details
Published in:Physical review letters 2007-11, Vol.99 (18), p.180505-180505, Article 180505
Main Authors: Chen, Shuai, Chen, Yu-Ao, Zhao, Bo, Yuan, Zhen-Sheng, Schmiedmayer, Jörg, Pan, Jian-Wei
Format: Article
Language:English
Subjects:
BELL THEOREM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
PHOTONS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS
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Summary: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 micros 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, Phys. Rev. Lett. 98, 240502 (2007)10.1103/PhysRevLett.98.240502] and can be extended to generate high-dimensional atom-photon entanglements.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.99.180505