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- W4360977772 abstract "Quantum key distribution (QKD) can provide fundamentally proven secure communication. Towards application, the secret key rate (SKR) is a key figure of merit for any QKD system. The SKR has so far been limited to about a few megabits per second. Here we report a QKD system that is able to generate keys at a record high SKR of 115.8 Mb s–1 over a 10 km standard optical fibre, and distribute keys over up to 328 km of ultralow-loss fibre. Such abilities are attributed to a multipixel superconducting nanowire single-photon detector with an ultrahigh counting rate, an integrated transmitter that can stably encode polarization states with low error, a fast post-processing algorithm for generating keys in real time and the high system clock rate operation. The results demonstrate the feasibility of practical high-rate QKD with photonic techniques, thus opening its possibility for widespread applications. A quantum key distribution with a key rate of 115.8 Mb s–1 is demonstrated over 10 km standard optical fibre. To this end, a high-speed and stable system, an integrated transmitter for low error modulation and multipixel superconducting nanowire single-photon detectors are developed." @default.
- W4360977772 created "2023-03-30" @default.
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- W4360977772 date "2023-03-13" @default.
- W4360977772 modified "2023-10-17" @default.
- W4360977772 title "High-rate quantum key distribution exceeding 110 Mb s–1" @default.
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- W4360977772 doi "https://doi.org/10.1038/s41566-023-01166-4" @default.
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