Practical long-distance quantum key distribution system using decoy levels

D. Rosenberg; C. G. Peterson; J. W. Harrington; P. R. Rice; N. Dallmann; K. T. Tyagi; K. P. McCabe; S. Nam; B. Baek; R. H. Hadfield; R. J. Hughes; J. E. Nordholt

doi:10.1088/1367-2630/11/4/045009

Practical long-distance quantum key distribution system using decoy levels

D. Rosenberg, C. G. Peterson, J. W. Harrington, P. R. Rice, N. Dallmann, K. T. Tyagi, K. P. McCabe, S. Nam, B. Baek, R. H. Hadfield, R. J. Hughes, J. E. Nordholt

School of Engineering & Physical Sciences

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69 Citations (Scopus)

Abstract

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. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Original language	English
Article number	045009
Journal	New Journal of Physics
Volume	11
DOIs	https://doi.org/10.1088/1367-2630/11/4/045009
Publication status	Published - 30 Apr 2009

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abstract = "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. {\textcopyright} IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.",

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AU - Rosenberg, D.

AU - Peterson, C. G.

AU - Harrington, J. W.

AU - Rice, P. R.

AU - Dallmann, N.

AU - Tyagi, K. T.

AU - McCabe, K. P.

AU - Nam, S.

AU - Baek, B.

AU - Hadfield, R. H.

AU - Hughes, R. J.

AU - Nordholt, J. E.

PY - 2009/4/30

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N2 - 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. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

AB - 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. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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Practical long-distance quantum key distribution system using decoy levels

Abstract

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