Method for direct detection of quantum entanglement

被引：228

作者：

Horodecki, P ^{[1
]}

Ekert, A

机构：

[1] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland

[2] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.89.127902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Basing on positive maps separability criterion we propose the experimentally viable, direct detection of quantum entanglement. It is efficient and does not require any a priori knowledge about the state. For two qubits it provides a sharp (i.e., "if and only if") separability test and estimation of amount of entanglement. We view this method as a new form of quantum computation, namely, as a decision problem with quantum data structure.

引用

页码：1279021 / 1279024

页数：4

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