Two-Mode Steady-State Entanglement in a Four-Level Atomic System  

作　　者：PING Yun-Xia ZHANG Chao-Min CHEN Guang-Long ZHU Peng-Fei CHENG Ze 平云霞;张朝民;陈光龙;朱鹏飞;成泽(College of Fundamental Studies,Shanghai University of Engineering Science,Shanghai 201600;School of Physics,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]College of Fundamental Studies,Shanghai University of Engineering Science,Shanghai 201600 [2]School of Physics,Huazhong University of Science and Technology,Wuhan 430074

出　　处：《Chinese Physics Letters》2013年第4期81-84,共4页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China under Grant No 11247311;the Innovation Program of Shanghai Municipal Education Commission under Grant No 11YZ216;the Excellent Young Scientist of Shanghai Municipal Education Commission under Grant No shgc js018;the Natural Science Foundation of Shanghai under Grant No 11ZR1414500.

摘　　要：We investigate the continuous variable entanglement in a four-level atom according to the criterion proposed by Duan et al.[Phys.Rev.Lett.84(2000)2722].The atomic coherence is introduced using two external classical driving fields.We study the steady-state entanglement of the system in the presence of losses,concluding that the creation of entangled states can be achievable under certain conditions.

关 键 词：conditions. CRITERION ANGLE 

分 类 号：O41[理学—理论物理]