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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相关论文

共 21 条

[1] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].

BENNETT, CH ;

BRASSARD, G ;

CREPEAU, C ;

JOZSA, R ;

PERES, A ;

WOOTTERS, WK .

PHYSICAL REVIEW LETTERS, 1993, 70 (13) :1895-1899

[2] Purification of noisy entanglement and faithful teleportation via noisy channels [J].

Bennett, CH ;

Brassard, G ;

Popescu, S ;

Schumacher, B ;

Smolin, JA ;

Wootters, WK .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :722-725

[3] Regulated and entangled photons from a single quantum dot [J].

Benson, O ;

Santori, C ;

Pelton, M ;

Yamamoto, Y .

PHYSICAL REVIEW LETTERS, 2000, 84 (11) :2513-2516

[4] Purification via entanglement swapping and conserved entanglement [J].

Bose, S ;

Vedral, V ;

Knight, PL .

PHYSICAL REVIEW A, 1999, 60 (01) :194-197

[5] A posteriori teleportation [J].

Braunstein, SI ;

Kimble, HJ .

NATURE, 1998, 394 (6696) :840-841

[6] MEASUREMENT OF THE BELL OPERATOR AND QUANTUM TELEPORTATION [J].

BRAUNSTEIN, SL ;

MANN, A .

PHYSICAL REVIEW A, 1995, 51 (03) :R1727-R1730

[7] Quantum repeaters:: The role of imperfect local operations in quantum communication [J].

Briegel, HJ ;

Dür, W ;

Cirac, JI ;

Zoller, P .

PHYSICAL REVIEW LETTERS, 1998, 81 (26) :5932-5935

[8]

Dür W, 1999, PHYS REV A, V59, P169, DOI 10.1103/PhysRevA.59.169

[9] Postselected versus nonpostselected quantum teleportation using parametric down-conversion [J].

Kok, P ;

Braunstein, SL .

PHYSICAL REVIEW A, 2000, 61 (04) :10

[10] Single-photon quantum-nondemolition detectors constructed with linear optics and projective measurements [J].

Kok, P ;

Lee, H ;

Dowling, JP .

PHYSICAL REVIEW A, 2002, 66 (06) :9