Realization of Optimal Universal and Phase-Covariant Quantum Machines via Input-Output Cavities

作     者：WANG Cong-Rong LI Da-Chuang ZHANG Feng-Yuan XU Rui-Min 王从戎;李大创;张凤元;许瑞敏

作者机构：School of Electronics and Information EngineeringHefei Normal UniversityHefei 230601 Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2013年第30卷第3期

页      面：9-13页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11204061,61073048,11104057 the Anhui Provincial Natural Science Foundation under Grant No 11040606M16 the China Postdoctoral Science Foundation under Grant No 20110490825 the Major Program of the Education Department of Anhui Province under Grant No KJ2010ZD08 the Key Program of the Education Department of Anhui Province under Grant Nos KJ2012A244,KJ2011A243,KJ2012A020 

主　　题：quantum scheme asymmetric 

摘      要：We present a scheme to realize a special quantum cloning machine via input-output *** cloning machine can copy information from one atom to another distant *** different parameters,the method can perform optimal symmetric(asymmetric)universal quantum cloning and optimal symmetric(asymmetric)phase-covariant *** to previous schemes,our scheme is more insensitive to actual environmental noise and can get higher fidelity in a current cavity quantum electrodynamics system with an entangled state acting as a quantum channel than a single-photon pulse.