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- W4319301700 abstract "Abstract Discrete-modulation continuous-variable (CV) quantum key distribution has the potential for large-scale deployment in secure quantum communication networks owing to its low implementation complexity and compatibility with the current coherent optical telecommunication. However, current discrete-modulation protocols require relatively large constellation sizes to achieve a key rate comparable to that of the Gaussian modulation. Here, we show that a high key rate comparable to the Gaussian modulation can be achieved using only ten or so coherent states by implementing suitable key map and numerical convex optimization techniques. Specifically, the key rate of the two-ring constellation with 12 coherent states (four states in the inner ring and eight states in the outer ring) can reach 2.4 times of that of original quadrature phase shift keying and 70% of the Gaussian modulation protocol at 50 km. Such an approach can easily be applied to existing systems, making the discrete-modulation protocol an attractive alternative for high-rate and low-cost applications in secure quantum communication networks." @default.
- W4319301700 created "2023-02-07" @default.
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- W4319301700 date "2023-02-01" @default.
- W4319301700 modified "2023-10-16" @default.
- W4319301700 title "Discrete-modulation continuous-variable quantum key distribution with a high key rate" @default.
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- W4319301700 doi "https://doi.org/10.1088/1367-2630/acb964" @default.
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