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Summary

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This study introduces a novel method for high-speed random number generation using multidimensional photon detection. This technique enhances single-photon events, significantly boosting the efficiency of quantum random number generators (QRNGs).

Area of Science:

Quantum Information Science
Photonics
Applied Physics

Background:

Quantum random number generators (QRNGs) are crucial for secure communication and computation.
Current QRNGs are limited by the count rate of single-photon detectors.
Improving the efficiency of individual photon detection events is key to increasing generation rates.

Purpose of the Study:

To develop a new strategy for high-speed random number generation.
To enhance the efficiency of random number generation per photon detection event.
To leverage multidimensional photon detection for improved QRNG performance.

Main Methods:

Utilizing the temporal and spatial coherence of coherent-state photons.
Implementing multidimensional photon detection.

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Employing a chip-scale CMOS-integrated single-photon avalanche diode array.

Extracting time-space measurement collapsed randomness from single-photon events.

Main Results:

Achieved simultaneous extraction of time-space randomness from single-photon detection.
Effectively improved the efficiency of random number generation per detection event.
Demonstrated extraction of up to 20 bits per photon detection event.
Reached a maximum random number generation rate of 2.067 Gbps.

Conclusions:

Multidimensional photon detection offers a viable strategy for high-speed QRNGs.
The developed method significantly enhances the efficiency of random number generation.
This approach represents a technical advancement for practical quantum random number generation systems.