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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Eurasian-scale experimental satellite-based quantum key distribution with detector efficiency mismatch analysis.

Aleksandr Khmelev, Alexey Duplinsky, Ruslan Bakhshaliev

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    Summary
    This summary is machine-generated.

    Micius satellite achieved global quantum-secured communication, establishing a link between two ground stations. This demonstrates practical quantum key distribution (QKD) with realistic security analysis for future satellite networks.

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    Area of Science:

    • Quantum Information Science
    • Satellite Communications
    • Cybersecurity

    Background:

    • The Micius satellite is a pioneering platform for global-scale quantum communication experiments.
    • Previous efforts have focused on demonstrating fundamental quantum phenomena over long distances.

    Purpose of the Study:

    • To report on the design of a 600-mm-aperture ground station enabling satellite-based quantum key distribution (QKD).
    • To establish and analyze a quantum-secured communication link between the Zvenigorod and Nanshan ground stations via the Micius satellite.

    Main Methods:

    • Design and implementation of a 600-mm-aperture ground station.
    • Conducting a quantum communication session utilizing the Micius satellite.
    • Extending security analysis for satellite-based QKD decoy-state protocols, accounting for detector-efficiency mismatch.
    • Simulating the QKD protocol for satellite passage to validate a semi-empirical receiver model.

    Main Results:

    • Successful establishment of a quantum-secured link between Zvenigorod and Nanshan ground stations.
    • Obtained an overall sifted key of 2.5 Mbits and a final key length of 310 kbits.
    • Validated a semi-empirical model for a realistic receiver, showing good agreement with experimental data.

    Conclusions:

    • The developed ground station facilitates global-scale satellite-based QKD.
    • The study validates security analysis for practical QKD systems considering realistic imperfections.
    • Results pave the way for enhanced security in future satellite quantum communication networks.