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Conferences > QELS > 1999 > QWA > QWA3
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1999),
  • paper QWA3

Point-to-point free-space quantum cryptography over 1/2 km

W.T. Buttler, R.J. Hughes, P.G. Kwiat, S.K. Lamoreaux, G.L. Morgan, J.E. Nordholt, and C.G. Peterson

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Abstract

We have demonstrated a point-to-point single photon quantum cryptographic key distribution over a free-space optical path of ~475 m (>1,000 times farther than any reported point-to-point demonstration,1 and >6 times the previous daylight transmission distance2), under both daylight and nighttime conditions. Within the next few months, we expect to extend the daylight range to 2 km. A brief description of the system is given here.

© 1999 Optical Society of America

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