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Quantum communication

Super-activated channels

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In recent years, significant progress has been made towards putting information theory on the footing of quantum mechanics. Researchers have now shown how optical fibres with zero quantum capacity can be super-activated to allow for perfect quantum communication.

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Figure 1: A simple model for a lossy single-mode optical fibre is a beamsplitter whose second input is a vacuum and whose second output is discarded.

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Authors and Affiliations

  1. Geza Giedke is at the Max Planck Institute of Quantum Optics, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany,

    Geza Giedke

  2. Michael M. Wolf is at Zentrum Mathematik, Technische Universität München, Boltzmannstrasse 3, 85748 Garching, Germany,

    Michael M. Wolf

Authors
  1. Geza Giedke
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  2. Michael M. Wolf
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Correspondence to Geza Giedke or Michael M. Wolf.

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Giedke, G., Wolf, M. Super-activated channels. Nature Photon 5, 578–580 (2011). https://doi.org/10.1038/nphoton.2011.223

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