Practical long-distance quantum key distribution system using decoy levels

被引：65

作者：

Rosenberg, D. ^{[1
]}

Peterson, C. G. ^{[1
]}

Harrington, J. W. ^{[1
]}

Rice, P. R. ^{[1
]}

Dallmann, N. ^{[1
]}

Tyagi, K. T. ^{[1
]}

McCabe, K. P. ^{[1
]}

Nam, S. ^{[2
]}

Baek, B. ^{[2
]}

Hadfield, R. H. ^{[3
]}

Hughes, R. J. ^{[1
]}

Nordholt, J. E. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Natl Inst Stand & Technol, Boulder, CO USA

[3] Heriot Watt Univ, Edinburgh, Midlothian, Scotland

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

SECURITY;

D O I：

10.1088/1367-2630/11/4/045009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum key distribution (QKD) has the potential for widespread real-world applications, but no secure long-distance experiment has demonstrated the truly practical operation needed to move QKD from the laboratory to the real world due largely to limitations in synchronization and poor detector performance. Here, we report results obtained using a fully automated, robust QKD system based on the Bennett Brassard 1984 (BB84) protocol with low-noise superconducting nanowire single-photon detectors (SNSPDs) and decoy levels to produce a secret key with unconditional security over a record 140.6 km of optical fibre, an increase of more than a factor of five compared with the previous record for unconditionally secure key generation in a practical QKD system.

引用

页数：10

共 36 条

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