Long-distance quantum key distribution in optical fiber

P. A. Hiskett; D. Rosenberg; C. G. Peterson; R. J. Hughes; S. Nam; A. E. Lita; A. J. Miller; J. E. Nordholt

doi:10.1088/1367-2630/8/9/193

Long-distance quantum key distribution in optical fiber

Quantum Physics 2009-11-13 v1

Authors: P. A. Hiskett , D. Rosenberg , C. G. Peterson , R. J. Hughes , S. Nam , A. E. Lita , A. J. Miller , J. E. Nordholt

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Abstract

Use of low-noise detectors can both increase the secret bit rate of long-distance quantum key distribution (QKD) and dramatically extend the length of a fibre optic link over which secure key can be distributed. Previous work has demonstrated use of ultra-low-noise transition-edge sensors (TESs) in a QKD system with transmission over 50 km. In this work, we demonstrate the potential of the TESs by successfully generating error-corrected, privacy-amplified key over 148.7 km of dark optical fibre at a mean photon number mu = 0.1, or 184.6 km of dark optical fibre at a mean photon number of 0.5. We have also exchanged secret key over 67.5 km that is secure against powerful photon-number-splitting attacks.

Keywords

quantum key distribution

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@article{arxiv.quant-ph/0607177,
  title  = {Long-distance quantum key distribution in optical fiber},
  author = {P. A. Hiskett and D. Rosenberg and C. G. Peterson and R. J. Hughes and S. Nam and A. E. Lita and A. J. Miller and J. E. Nordholt},
  journal= {arXiv preprint arXiv:quant-ph/0607177},
  year   = {2009}
}

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7 pages, 4 figures

Long-distance quantum key distribution in optical fiber

Abstract

Keywords

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