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- W4321487998 abstract "Decoy-state method has greatly filled in loopholes from multi-photon pulses in the field of quantum key distribution (QKD) and it has been employed in almost all practical QKD systems in recent years. However, security and performance of the practical decoy-state QKDs are still limited by inaccurate modulations such as random intensity fluctuation and correlated intensity fluctuation. In this work, an intensity tomography method is proposed as a countermeasure against these fluctuations. It has an ability to tightly bound the unknown density matrices of photon-number state and accurately calibrate the fluctuations by measuring the decoy states with a local single-photon detector. We verified the tomography method by experiments and simulations. The results indicated that our method can efficiently mitigate the flaws from these fluctuations to improve the protocol performance and practical security. Noting that these fluctuations are inevitable in practical QKDs, our method would pave the avenue for QKD's practical applications." @default.
- W4321487998 created "2023-02-23" @default.
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- W4321487998 date "2023-08-01" @default.
- W4321487998 modified "2023-10-14" @default.
- W4321487998 title "Intensity Tomography Method for Secure and High-Performance Quantum Key Distribution" @default.
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- W4321487998 doi "https://doi.org/10.1109/jlt.2023.3247766" @default.
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