This paper presents a continuous-variable (CV) quantum key distribution (QKD) system that generates composable keys secure against collective attacks, a significant step towards practicality and performance parity with discrete-variable QKD. The system uses Gaussian-modulated coherent states and overcomes previous limitations by improving the security proof and achieving fast, low-noise, and highly stable system operation. Composable keys are generated with approximately 2 × 10⁸ coherent states.
Publisher
Nature Communications
Published On
Aug 12, 2022
Authors
Nitin Jain, Hou-Man Chin, Hossein Mani, Cosmo Lupo, Dino Solar Nikolic, Arne Kordts, Stefano Pirandola, Thomas Brochmann Pedersen, Matthias Kolb, Bernhard Ömer, Christoph Pacher, Tobias Gehring, Ulrik L. Andersen
Tags
Quantum Key Distribution
Continuous-variable
Composable keys
Security
Gaussian-modulated coherent states
Collective attacks
Stable operation
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