Scheme for Concentration of Unknown Greeberger-Horne-Zeilinger Entangled States via Cavity Decay  

作　　者：张小伟 刘翔 唐筱芳 唐有良 

机构地区：[1]Department of Physics, Hunan Normal University, Changsha 410081

出　　处：《Chinese Physics Letters》2007年第3期602-605,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 No 10374025, and the Scientific Research Fund of Hunan Provincial Education Department under Grant No 05c415.

摘　　要：We present a scheme for entanglement concentration of an unknown atomic non-maximally entangled GHZ state via cavity decay. In the scheme, the atom trapped in a cavity is manipulated by laser field, so the maximally entangled GHZ state can be obtained by performing certain operation, which can be realized by illuminating the atom in a cavity. Our method is robust against spontaneous atomic decay.We present a scheme for entanglement concentration of an unknown atomic non-maximally entangled GHZ state via cavity decay. In the scheme, the atom trapped in a cavity is manipulated by laser field, so the maximally entangled GHZ state can be obtained by performing certain operation, which can be realized by illuminating the atom in a cavity. Our method is robust against spontaneous atomic decay.

关 键 词：INFORMATION CONCENTRATION ATOMIC-STATE TELEPORTATION PURIFICATION COMMUNICATION CHANNELS 

分 类 号：O4[理学—物理]