Non-classical correlation between a

Non-classical correlation between a single photon and the collective spin excited state of a cold atomic ensemble

We experimentally establish a non-classical correlation between a single Stokes photon and the collective spin excited state of a cold atomic ensemble by using a spontaneous Raman scattering process.The correlation between them can be proved by transferring the spin excited state of the atomic ensemble into an anti-Stokes photon and checking the Cauchy-Schwarz inequality between the Stokes and the anti-Stokes photons.The non-classical correlation can be kept for at least 300 ns.

作 者： Xiaosong Lu Qunfeng Chen BaosenShi Guangcan Guo   作者单位： Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China  刊 名： 中国光学快报(英文版)  ISTIC EI 英文刊名： CHINESE OPTICS OF LETTERS  年，卷(期)： 2009 7(11)  分类号：   关键词：  

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