Phase-Matching Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
نویسندگان
چکیده
Continuous-variable measurement-device-independent quantum key distribution (CV-MDI-QKD) allows remote parties to share information-theoretical secure keys while defending all the side-channel attacks on measurement devices. However, transmission distance and secret rate are quite limited due high untrusted equivalent excess noise in Gaussian modulation. More particularly, extremely high-efficiency homodyne detections required for even non-zero distances, which directly restrict its practical realization. Here, we propose a CV-MDI-QKD protocol by encoding information into matched discrete phases of two groups coherent states, decreases detection efficiency ideally asymmetric cases, makes it possible practically achieve with current low-efficiency detections. Besides, proof-of-principle experiment locally generated oscillator is implemented, which, first time, demonstrates realizability using fiber-based The discrete-modulated phase-matching method provides an alternative direction applicable security.
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ژورنال
عنوان ژورنال: Symmetry
سال: 2022
ISSN: ['0865-4824', '2226-1877']
DOI: https://doi.org/10.3390/sym14030568