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Quantum communication

Super-activated channels

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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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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