Non-Classical Correlated Photon Pairs Generation via Cascade Transition of 5S1/2-5P3/2-5D5/2 in a Hot SSRb Atomic Vapor  

作　　者：张伟 丁冬生 潘建松 史保森 

机构地区：[1]Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026 [2]Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026

出　　处：《Chinese Physics Letters》2014年第6期121-124,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11174271, 61275115, and 10874171, the National Fundamental Research Program of China under Grant No 2011CBA00200, the Youth Innovation Fund from University of Science and Technology of China under Grant No ZC9850320804, the Innovation Fund fl＇om Chinese Academy of Sciences, and the Program for New Century Excellent Talents in University.

摘　　要：We experimentally prepare the non-classical correlated photon pairs at the wavelengths of 780 and 776 mn via the cascade transition of 5S1/2 5P3/2-5D5/2 in a hot SSRb atomic ensemble. By measuring the function of cross-correlation and auto-correlation of photons, a violation of Cauehy Schwarz inequality by a factor of 283 is obtained, which clearly indicates a strong non-classicM correlation between the generated photons. We also find that noise photons scattered from pump lasers have a strong effect on the Cauchy-Schwarz inequality factor by changing the intensity of the pump laser, the experimental results are consistent with the theoretical predictions.We experimentally prepare the non-classical correlated photon pairs at the wavelengths of 780 and 776 mn via the cascade transition of 5S1/2 5P3/2-5D5/2 in a hot SSRb atomic ensemble. By measuring the function of cross-correlation and auto-correlation of photons, a violation of Cauehy Schwarz inequality by a factor of 283 is obtained, which clearly indicates a strong non-classicM correlation between the generated photons. We also find that noise photons scattered from pump lasers have a strong effect on the Cauchy-Schwarz inequality factor by changing the intensity of the pump laser, the experimental results are consistent with the theoretical predictions.

分 类 号：TN918.2[电子电信—通信与信息系统] O178[电子电信—信息与通信工程]