Free-space quantum key distribution with entangled photons

Ivan Marcikic; Antia Lamas-Linares; Christian Kurtsiefer

doi:10.1063/1.2348775

Free-space quantum key distribution with entangled photons

Quantum Physics 2007-05-23 v2

Authors: Ivan Marcikic , Antia Lamas-Linares , Christian Kurtsiefer

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Abstract

We report on a complete experimental implementation of a quantum key distribution protocol through a free space link using polarization-entangled photon pairs from a compact parametric down-conversion source. Over 10 hours of uninterrupted communication between sites 1.5 km apart, we observe average key generation rates of 630 per second after error correction and privacy amplification. Our scheme requires no specific hardware channel for synchronization apart from a classical wireless link, and no explicit random number generator.

Keywords

quantum key distribution quantum entanglement

Cite

@article{arxiv.quant-ph/0606072,
  title  = {Free-space quantum key distribution with entangled photons},
  author = {Ivan Marcikic and Antia Lamas-Linares and Christian Kurtsiefer},
  journal= {arXiv preprint arXiv:quant-ph/0606072},
  year   = {2007}
}

Comments

3 pages, 2 figures, reviewed version, accepted in Applied Physics Letters

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