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- W2933280488 abstract "The measurement-device-independent quantum key distribution (MDI-QKD) protocol is immune to imperfect measurement devices. However, its practicality and performance when implemented in continuous-variable (CV) mode are still not satisfactory. We propose a CV-MDI-QKD protocol based on modulated squeezed states, and analyze its security against two-mode Gaussian attack. The results show that the protocol can achieve a higher secret key rate and transmission distance than previous coherent-state and squeezed-state protocols. A method to compensate the imperfection of a practical homodyne detector using phase-sensitive optical amplifiers is also presented. By setting an appropriate optical amplification gain, realistic detectors with ordinary quantum efficiency can be employed. In addition, we discuss the impact of finite-size effects on the secret key rate of the protocol. The methods presented may aid in the practical application of the CV-MDI-QKD protocol." @default.
- W2933280488 created "2019-04-11" @default.
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- W2933280488 date "2019-04-03" @default.
- W2933280488 modified "2023-10-15" @default.
- W2933280488 title "Continuous-variable measurement-device-independent quantum key distribution using modulated squeezed states and optical amplifiers" @default.
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- W2933280488 doi "https://doi.org/10.1103/physreva.99.042309" @default.
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