One-Step Generation of Multiqubit Greenberger-Horne-Zeilinger States in a Driven Circuit QED System  

作　　者：黄劲松 聂伟 韦联福 

机构地区：[1]Quantum Optoelectronics Laboratory,School of Physics and Technology,Southwest Jiaotong University [2]State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics and Engineering,Sun Yat-Sen University

出　　处：《Communications in Theoretical Physics》2011年第12期1005-1008,共4页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.10874142 and 90921010

摘　　要：We propose an efficient scheme to generate multiqubit Greenberger-ttorne--Zeilinger （GHZ） states by one- step quantum operation in a driven circuit quantum electrodyna.mics （QED） system. Our proposal is based on a unitary evolution exp[-iλSx^2], with Sx being the collective spin operator in x direction and A a controllable parameter, induced by driving the resonator. The quantum operation avoids resonator-field decay and may achieve the GHZ states with ideal success probability. The feasibility with the experimentally-demonstrated circuit QED system is also discussed.

关 键 词：Greenberger Horne-Zeilinger states circuit quantum electrodynamics 

分 类 号：O413.2[理学—理论物理] TN322.8[理学—物理]