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Parallel real-time quantum random number generator.

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    This study presents a fast quantum random number generator using vacuum fluctuations and multiplexing. It achieves a high generation rate of 8.25 Gbps in real-time, overcoming electronic limitations.

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    Area of Science:

    • Quantum physics
    • Information science

    Background:

    • Quantum random number generation (QRNG) leverages quantum mechanics for true randomness.
    • Real-time QRNG speed is often limited by electronic bandwidth and data processing.

    Purpose of the Study:

    • To develop a high-speed, real-time quantum random number generator.
    • To overcome the speed limitations of conventional QRNG systems.

    Main Methods:

    • Utilized a multiplexing scheme with continuous variable vacuum fluctuations.
    • Extracted randomness from multiple sideband frequency modes of quantum vacuum states.
    • Implemented parallel postprocessing using a field-programmable gate array (FPGA) with Toeplitz-hashing extractors.

    Main Results:

    • Achieved a cumulative real-time generation rate of 8.25 Gbps.
    • Demonstrated a fast quantum random number generator based on vacuum fluctuations.
    • The system relies on integrated optoelectronic components for compactness and economy.

    Conclusions:

    • The developed multiplexing scheme significantly enhances real-time quantum random number generation speed.
    • This approach offers a pathway to compact, economical, and high-performance quantum random number generators.