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Updated: May 30, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Two-bit quantum random number generator based on photon-number-resolving detection.

Yi Jian¹, Min Ren, E Wu

¹State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.

The Review of Scientific Instruments

|August 3, 2011

Summary

This summary is machine-generated.

This study introduces a fast quantum random number generator utilizing photon statistics from coherent light. It achieves true randomness for multi-bit sequences, a novel advancement in quantum random number generation.

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Area of Science:

Quantum physics
Quantum optics
Information science

Background:

True random number generation is crucial for secure communications and scientific simulations.
Existing methods may face limitations in speed or true randomness.
Quantum phenomena offer a promising source for unpredictable random numbers.

Purpose of the Study:

To develop a fast, two-bit quantum random number generator.
To leverage the inherent randomness of photon statistics in coherent light.
To demonstrate the generation of multi-bit true random numbers from a coherent light source.

Main Methods:

Utilizing a coherent light source with well-defined photon statistics.
Employing a photon-number-resolving detector to count photons per pulse.
Implementing a system to convert photon counts into two-bit random numbers.

Main Results:

Successfully generated fast two-bit random numbers.
Demonstrated that Poissonian photon statistics ensure complete randomness.
Achieved the first generation of multi-bit true random numbers from multi-photon events of a coherent light source.

Conclusions:

The proposed method provides a viable and fast approach for quantum random number generation.
Photon statistics of coherent light sources are a reliable basis for true randomness.
This work advances the capability of generating high-quality random numbers for quantum technologies.