Optimal estimation of two-qubit pure-state entanglement

被引：0

作者：

Acián, Antonio ^{[1
]}

Tarrach, Rolf ^{[1
]}

Vidal, Guifreá ^{[1
]}

机构：

[1] Dept. d'Estructura Constituents M., Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain

来源：

Physical Review A - Atomic, Molecular, and Optical Physics | 2000年 / 61卷 / 06期

关键词：

Electron transport properties - Matrix algebra - Parameter estimation - Polarization - Vectors;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The problem of optimally estimating the entanglement of an unknown pure state of two qubits was analyzed. For this purpose, the quality of the most general quantum measurements on N identical copies of the state was assessed through the gain of information they provide about the nonlocal parameter of the state. A solution to this problem was established and proven. In particular, it was shown that the optimal estimation of a nonlocal parameter can be done through a local measurement.

引用

页码：062307 / 062301

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