High-fidelity source of four-photon entanglement

被引：29

作者：

Gaertner, S

Bourennane, M

Eibl, M

Kurtsiefer, C

Weinfurter, H ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[2] Univ Munich, Sekt Phys, D-80799 Munich, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2003年 / 77卷 / 08期

关键词：

D O I：

10.1007/s00340-003-1321-5

中图分类号：

O43 [光学];

学科分类号：

070207 [光学]; 0803 [光学工程];

摘要：

A polarisation-entangled four-photon state can be generated directly by a second order parametric down-conversion process. We use this emission to characterise the properties of a four-qubit state and to analyse its entanglement based on the violation of a four-particle Bell inequality. The observed high count rates and the fidelity of the polarisation correlations are the basis for the realisation of several new multiparty quantum communications schemes, such as secure multiparty key distribution and quantum telecloning.

引用

页码：803 / 807

页数：5

共 31 条

[1]

BOURENNANE M, 2003, QUANTPH0309043

[2]

BOURENNANE M, 2003, QUANTPH0309041

[3]

Experimental quantum teleportation [J].