Scheme for splitting quantum information via W states in cavity QED systems  

作　　者：于希梅 顾永建 马丽珍 周邦安 

机构地区：[1]Department of Physics,Ocean University of China [2]Weifang Education TV

出　　处：《Chinese Physics B》2008年第2期462-466,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No 60677044);the Funds for Introduced Talent of Ocean University of China

摘　　要：Assisted by multipartite entanglement, Quantum information may be split so that the original qubit can be reconstructed if and only if the recipients cooperate. This paper proposes an experimentally feasible scheme for splitting quantum information via W-type entangled states in cavity QED systems, where three-level Rydberg atoms interact with nonresonant cavities. Since W-type states are used as the quantum channel and the cavities are only virtually excited, the scheme is easy to implement and robust against decoherence, and the dependence on the quality factor of the cavities is greatly reduced.Assisted by multipartite entanglement, Quantum information may be split so that the original qubit can be reconstructed if and only if the recipients cooperate. This paper proposes an experimentally feasible scheme for splitting quantum information via W-type entangled states in cavity QED systems, where three-level Rydberg atoms interact with nonresonant cavities. Since W-type states are used as the quantum channel and the cavities are only virtually excited, the scheme is easy to implement and robust against decoherence, and the dependence on the quality factor of the cavities is greatly reduced.

关 键 词：splitting quantum information W-type states cavity QED 

分 类 号：O431.2[机械工程—光学工程]