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- W4378781972 abstract "Quantum key distribution (QKD) is a revolutionary cryptography response to the rapidly growing cyberattacks threat posed by quantum computing. Yet, the roadblock limiting the vast expanse of secure quantum communication is the exponential decay of the transmitted quantum signal with the distance. Today's quantum cryptography is trying to solve this problem by focusing on quantum repeaters. However, efficient and secure quantum repetition at sufficient distances is still far beyond modern technology. Here, we shift the paradigm and build the long-distance security of the QKD upon the quantum foundations of the Second Law of Thermodynamics and end-to-end physical oversight over the transmitted optical quantum states. Our approach enables us to realize quantum states' repetition by optical amplifiers keeping states' wave properties and phase coherence. The unprecedented secure distance range attainable through our approach opens the door for the development of scalable quantum-resistant communication networks of the future." @default.
- W4378781972 created "2023-06-01" @default.
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- W4378781972 date "2023-05-30" @default.
- W4378781972 modified "2023-09-27" @default.
- W4378781972 title "Forty thousand kilometers under quantum protection" @default.
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- W4378781972 doi "https://doi.org/10.1038/s41598-023-35579-6" @default.
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