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    Area of Science:

    • Quantum communication
    • Satellite technology
    • Cybersecurity

    Background:

    • Terrestrial quantum key distribution (QKD) is limited to a few hundred kilometers.
    • Global-scale quantum communication networks require alternative solutions like low-Earth-orbit satellites.

    Purpose of the Study:

    • To demonstrate the feasibility of QKD between a stationary transmitter and a moving receiver.
    • To simulate satellite-based QKD conditions for future global quantum networks.

    Main Methods:

    • Developed a system for QKD between a stationary transmitter and a receiver on a moving truck.
    • Implemented active correction for beam pointing, photon polarization, and time-of-flight.
    • Simulated angular speed equivalent to a 600 km altitude satellite.

    Main Results:

    • Successfully demonstrated QKD between a stationary and a moving platform.
    • Achieved an asymptotic secure key generation rate of 40 bits/s.
    • Overcame significant challenges in maintaining stable quantum signal transmission under dynamic conditions.

    Conclusions:

    • This experiment represents the first demonstration of QKD from a stationary transmitter to a moving receiver simulating satellite conditions.
    • The successful implementation of active correction techniques paves the way for robust satellite-based QKD.
    • The results support the potential of using satellites to establish global quantum communication networks.