A real-local-oscillator CV-QKD link is demonstrated for the first time without pilot tones, using a particle smoother that exploits the symbols Alice already reveals.
Pilot-assisted intradyne reception for high-speed continuous-variable quantum key distribution with true local oscillator
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abstract
We present a pilot-assisted coherent intradyne reception methodology for CV-QKD with true local oscillator. An optically phase-locked reference tone, prepared using carrier-suppressed optical single-sideband modulation, is multiplexed in polarisation and frequency to the 250 Mbaud quantum signal in order to provide optical frequency- and phase matching between quantum signal and local oscillator. Our concept allows for high symbol rates and can be operated at an extremely low excess-noise level, as validated by experimental measurements.
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quant-ph 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Continuous-Variable Quantum Key Distribution with a Real Local Oscillator and without Auxiliary Signals
A real-local-oscillator CV-QKD link is demonstrated for the first time without pilot tones, using a particle smoother that exploits the symbols Alice already reveals.