Complete elimination of information leakage in continuous-variable quantum communication channels

Christian S. Jacobsen, Lars S. Madsen, Vladyslav C. Usenko, Radim Fillip, Ulrik L. Andersen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

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.
Original languageEnglish
Journaln p j Quantum Information
Volume4
Issue number1
Number of pages6
ISSN2056-6387
DOIs
Publication statusPublished - 2018

Cite this

Jacobsen, Christian S. ; Madsen, Lars S. ; Usenko, Vladyslav C. ; Fillip, Radim ; Andersen, Ulrik L. / Complete elimination of information leakage in continuous-variable quantum communication channels. In: n p j Quantum Information. 2018 ; Vol. 4, No. 1.
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Complete elimination of information leakage in continuous-variable quantum communication channels. / Jacobsen, Christian S.; Madsen, Lars S.; Usenko, Vladyslav C.; Fillip, Radim; Andersen, Ulrik L.

In: n p j Quantum Information, Vol. 4, No. 1, 2018.

Research output: Contribution to journalJournal articleResearchpeer-review

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AU - Usenko, Vladyslav C.

AU - Fillip, Radim

AU - Andersen, Ulrik L.

PY - 2018

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AB - 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.

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