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Updated: May 21, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Ultrafast quantum random number generation based on quantum phase fluctuations.

Feihu Xu1, Bing Qi, Xiongfeng Ma

  • 1Center for Quantum Information and Quantum Control, Department of Physics and Department of Electrical & Computer Engineering, University of Toronto, Toronto, ON M5S 3G4, Canada. feihu.xu@utoronto.ca

Optics Express
|June 21, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces an ultrafast quantum random number generator (QRNG) achieving over 6 Gbits/s by using laser quantum phase fluctuations. The method ensures true randomness even against adversaries with partial data knowledge.

Related Experiment Videos

Last Updated: May 21, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

  • Quantum physics
  • Information security

Background:

  • Quantum random number generators (QRNGs) leverage quantum mechanics for true randomness.
  • Existing QRNGs often use single-photon detection, limiting their speed.

Purpose of the Study:

  • To demonstrate an ultrafast QRNG exceeding 6 Gbits/s.
  • To address security concerns regarding potential adversaries with partial data knowledge.

Main Methods:

  • Utilized quantum phase fluctuations of a near-threshold laser.
  • Implemented postprocessing techniques to remove adversary's partial knowledge.
  • Quantified randomness using min-entropy and applied Trevisan's and Toeplitz-hashing extractors.

Main Results:

  • Achieved an experimental QRNG speed exceeding 6 Gbits/s.
  • Demonstrated rigorous removal of partial information through postprocessing.
  • Information-theoretic provability of distilled randomness.

Conclusions:

  • The demonstrated system is a simple, robust, low-cost, and high-speed QRNG.
  • The approach is feasible for practical, high-performance random number generation.
  • Highlights the potential of laser phase fluctuations for secure randomness.