Narrowband Biphoton Generation with Four-Wave Mixing in a Far-Detuning Three-Level System  

作　　者：CHEN Peng ZHOU Shu-Yu XU Zhen DUAN Ya-Fan CUI Guo-Dong HONG Tao WANG Yu-Zhu 陈鹏;周蜀渝;徐震;段亚凡;崔国栋;洪涛;王育竹(Key Laboratory for Quantum Optics,Center for Cold Atom Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800)

机构地区：[1]Key Laboratory for Quantum Optics,Center for Cold Atom Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800

出　　处：《Chinese Physics Letters》2011年第7期168-171,共4页中国物理快报（英文版）

基　　金：by the National Natural Science Foundation of China under Grant No 10804115;the National Basic Research Program of China under Grant Nos 2006CB921202 and 2011CB921504;the Knowledge Innovation Project of Chinese Academy of Sciences;the Shanghai Committee of Science and Technology under Grant No 09DJ1400700.

摘　　要：Non-classical paired photons are generated by a four-wave mixing process in a far-detuning three-level system with cold atoms.A violation of the Cauchy–Schwartz inequality of a factor of 310 is observed.This phenomenon shows that paired photons have a non-classical correlation.The experimental results are compared with theoretical results obtained using perturbation theory.The oscillation frequencies of the two-photon intensity correlation functions are in reasonable agreement with the effective Rabi frequencies of the coupling laser.However,we find that the dephasing rates(or decay rates)observed are far larger than the theoretical values.

关 键 词：theory photon INEQUALITY 

分 类 号：O17[理学—数学]