Journal article · Preprint article
Complete elimination of information leakage in continuous-variable quantum communication channels
In all lossy communication channels realized to date, information is inevitably leaked to a potential eavesdropper. Here we present a communication protocol that does not allow for any information leakage to a potential eavesdropper in a purely lossy channel. By encoding information into a restricted Gaussian alphabet of squeezed states we show, both theoretically and experimentally, that the Holevo information between the eavesdropper and the intended recipient can be exactly zero in a purely lossy channel while minimized in a noisy channel.
This result is of fundamental interest, but might also have practical implications in extending the distance of secure quantum key distribution.
Language: | English |
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Publisher: | Nature Publishing Group UK |
Year: | 2018 |
Pages: | 9 |
ISSN: | 20566387 |
Types: | Journal article and Preprint article |
DOI: | 10.1038/s41534-018-0084-0 |
ORCIDs: | Jacobsen, Christian S. and Andersen, Ulrik L. |