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Entanglement Capacity of Two-Qubit Unitary Operator with the Help of Auxiliary System 被引量:2

Entanglement Capacity of Two-Qubit Unitary Operator with the Help of Auxiliary System
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摘要 The'entanglement capacity of general two-qubit unitary operators is studied when auxiliary systems are allowed, and the analytical results based on linear entropy when input states are disentangled are given. From the results the condition for perfect entangler, α1 = α2 = π/4, is obtained. Contrary to the case without auxiliary system, the parameter α3 may play active role to the entanglement capacity when auxiliary systems are allowed.
机构地区 Department of Physics
出处 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第6期1029-1032,共4页 理论物理通讯(英文版)
基金 The project supported by National Natural Science Foundation of China under Grant No. 60433050
关键词 unitary operator entanglement capacity linear entropy auxiliary system 双量子位 保范算子 量子纠缠能力 线性熵 辅助系统
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参考文献14

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