Journal
PHYSICAL REVIEW A
Volume 90, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.90.042329
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Funding
- French National Research Agency through the High PERformance coherent quantum COMmunications [2011-CHRI-006]
- European Union through the Quantum Virtual Private Network [FEDER-41402]
- European Union through the Quantum Certification [FP7-PEOPLE-2009-IAPP]
- project HyQuNet - Ministerio de Economia y Competitividad (MINECO), Spain [TEC2012-35673]
- European CHIST-ERA project Composing Quantum Channels
- MINECO [PRI-PIMCHI-2011-1071]
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Here, we demonstrate that a practical continuous-variable quantum key distribution (QKD) protocol relying on the Gaussian modulation of coherent states features secret key rates that cannot be achieved with standard qubit discrete-variable QKD protocols. Notably, we report a practical postprocessing that allows us to extract more than 1 bit of secret key per channel use.
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