On universal quantum cloning and state estimation

被引：3
|
作者：
Bruss, D [1 ]
机构：
[1] Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 1999年 / 69卷 / 5-6期
关键词：
PACS: 03.67.-a; 03.65.-w;
D O I：
10.1007/s003400050826
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Both perfect cloning and perfect state estimation of an unknown pure quantum state are impossible, due to principles of quantum mechanics. Nevertheless, they can be performed imperfectly. A link between these two scenarios allows us to derive an upper bound for the fidelity in one of them, given an upper bound is known in the other. Furthermore, it is shown that also a lower bound on cloning is related to an upper bound on state estimation.
引用
收藏
页码：401 / 405
页数：5
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