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Quantum cryptography

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Using photons to disseminate encryption codes with complete security is one of the great successes of quantum information science. It has now been shown that long-distance cryptographic communication is just as effective when the scheme involves measuring the wave properties of light, rather than its particle properties.

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Figure 1: Quantum key distribution systems using DV single-photon state encoding (green) and CV quadrature-field amplitude encoding (red).

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Authors and Affiliations

  1. Ping Koy Lam is at the Department of Quantum Science, Australian National University, Canberra, Australian Capital Territory 0200, Australia,

    P. K. Lam

  2. Timothy C. Ralph is at the School of Mathematics and Physics, University of Queensland, St. Lucia, Queensland 4072, Australia,

    T. C. Ralph

Authors
  1. P. K. Lam
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  2. T. C. Ralph
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Correspondence to P. K. Lam.

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Lam, P., Ralph, T. Continuous improvement. Nature Photon 7, 350–352 (2013). https://doi.org/10.1038/nphoton.2013.104

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