Optimal estimation of two-qubit pure-state entanglement -: art. no. 062307

被引：31

作者：

Acín, A ^{[1
]}

Tarrach, R ^{[1
]}

Vidal, G ^{[1
]}

机构：

[1] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

来源：

PHYSICAL REVIEW A | 2000年 / 61卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.61.062307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present optimal measuring strategies for an estimation of the entanglement of unknown two-qubit pure states and of the degree of mixing of unknown single-qubit mixed states, of which N identical copies are available. The most general measuring strategies are considered in both situations, to conclude in the first case that a local, although collective, measurement suffices to estimate entanglement, a nonlocal property, optimally.

引用

页数：8

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