Implementing two optimal economical quantum cloning with superconducting quantum interference devices in a cavity  

作　　者：YE Liu HU GuiYu LI AiXia 

机构地区：[1]School of Physics & Material Science, Anhui University, Hefei 230039, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第1期115-120,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.10674001);the Program of the Education Department of Anhui Province (Grant No.KJ2007A002)

摘　　要：We propose a unified scheme to implement the optimal 1→ 3economical phase-covariant quantum cloning and optimal 1→3 economical real state cloning with superconducting quantum interference devices (SQUIDs) in a cavity.During this process,no transfer of quantum information between the SQUIDs and cavity is required.The cavity field is only virtually excited.The scheme is insensitive to cavity decay.Therefore,the scheme can be experimentally realized in the range of current cavity QED techniques.We propose a unified scheme to implement the optimal 1→ 3economical phase-covariant quantum cloning and optimal 1→3 economical real state cloning with superconducting quantum interference devices （SQUIDs） in a cavity.During this process,no transfer of quantum information between the SQUIDs and cavity is required.The cavity field is only virtually excited.The scheme is insensitive to cavity decay.Therefore,the scheme can be experimentally realized in the range of current cavity QED techniques.

关 键 词：OPTIMAL 1→ 3 OPTIMAL phase-covariant quantum cloning real state cloning superconducting quantum interference devices 

分 类 号：O413[理学—理论物理] TN201[理学—物理]