Three-Party Quantum State Sharing of an Arbitrary Unknown Two-Qubit State Based on Entanglement Swapping and Bell-State Measurements  

作　　者：YUAN Hao SONG Jun HOU Kui HU Xiao-Yuan HAN Lian-Fang SHI Shou-Hua 

机构地区：[1]Department of Mathematics ＆ Physics, West Anhui University, Lu＇an 237012, China [2]School of Physics ＆ Material Science, Anhui University, Hefei 230039, China [3]Teaching ＆ Research Section of Physics, School of Basic Medical Science, Anhui Medical University, Hefei 230032, China

出　　处：《Communications in Theoretical Physics》2009年第7期50-54,共5页理论物理通讯（英文版）

基　　金：Supported by the Natural Science Research Programme of the Education Department of Anhui Province under Grant Nos.KJ2009B039Z and KJ2009B018Z;the Municipal Level Research Project from Lu'an City directive entrusted to West AnHui University under Grant No.2008LW004

摘　　要：We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using afour-qubit cluster-class state and a Bell state as a quantum channel With a quantum controlled phase gate (QCPG)operation and a local unitary operation,any one of the two agents has the access to reconstruct the original state ifhe/she collaborates with the other one,whilst individual agent obtains no information.As all quantum resource canbe used to carry the useful information,the intrinsic efficiency of qubits approaches the maximal value.Moreover,thepresent scheme is more feasible with present-day technique.

关 键 词：quantum state sharing entanglement swapping Bell-state measurements QCPG operation local unitary operation 

分 类 号：O413.1[理学—理论物理] TN91[理学—物理]