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题名: Positive maps that are not completely positive
作者: Yu, SX
刊名: PHYSICAL REVIEW A
出版日期: 2000
卷号: 62, 期号:2, 页码:-
关键词: SEPARABILITY CRITERION ;  REDUCTION CRITERION ;  BOUND ENTANGLEMENT ;  MIXED STATES ;  DISTILLATION ;  CHANNELS
学科分类: Physics
通讯作者: Yu, SX , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The concept of the half density matrix is proposed. It unifies the quantum states that are described by density matrices and physical processes that are described by completely positive maps. With the help of the half-density-matrix representation of the Hermitian linear map, we show that every positive map that is not completely positive is a difference of two completely positive maps. A necessary and sufficient condition for a positive map that is not completely positive is also presented, which is illustrated by some examples.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000088683400117
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12929
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Yu, SX. Positive maps that are not completely positive[J]. PHYSICAL REVIEW A,2000,62(2):-.
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