Unambiguous discrimination of mixed quantum states

被引：11
|
作者：
Zhang, C [1 ]
Feng, YA [1 ]
Ying, MS [1 ]
机构：
[1] Tsinghua Univ, Dept Comp Sci & Technol, State Key Lab Intelligent Technol & Syst, Beijing 100084, Peoples R China
来源：
PHYSICS LETTERS A | 2006年 / 353卷 / 04期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physleta.2005.12.097
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The problem of unambiguous discrimination between mixed quantum states is addressed by isolating the part of each mixed state which has no contribution to discrimination and by employing the strategy of set discrimination of pure states. A necessary and sufficient condition of unambiguous mixed state discrimination is presented. An upper bound of the efficiency is also derived. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：300 / 306
页数：7
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