Construction of a quantum repeater with linear optics

被引：42

作者：

Kok, P ^{[1
]}

Williams, CP ^{[1
]}

Dowling, JP ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

PHYSICAL REVIEW A | 2003年 / 68卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.68.022301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the mechanism and complexity of an efficient quantum repeater, employing double-photon guns, for long-distance optical quantum communication. The guns create polarization-entangled photon pairs on demand. One such source might be a semiconducter quantum dot, which has the distinct advantage over parametric down-conversion that the probability of creating a photon pair is close to 1, while the probability of creating multiple pairs vanishes. The swapping and purifying components are implemented by polarizing beam splitters and probabilistic optical controlled-NOT gates. We also show that the bottleneck in the efficiency of this repeater is due to detector losses.

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页数：5

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