Detection of entanglement with few local measurements -: art. no. 062305

被引：208

作者：

Gühne, O

Hyllus, P

Bruss, D

Ekert, A

Lewenstein, M

Macchiavello, C

Sanpera, A

机构：

[1] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

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

[3] Dipartimento Fis A Volta, I-27100 Pavia, Italy

[4] INFM, Unita Pavia, I-27100 Pavia, Italy

来源：

PHYSICAL REVIEW A | 2002年 / 66卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.66.062305

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We introduce a general method for the experimental detection of entanglement by performing only few local measurements, assuming some prior knowledge of the density matrix. The idea is based. on the minimal decomposition of witness operators into a pseudomixture of local operators. We discuss an experimentally relevant case of two qubits, and show an example how bound entanglement can be detected with few local measurements.

引用

页数：5

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