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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Random Sampling Method01:09

Random Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. Among the various sampling methods used by...

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Related Experiment Video

Updated: May 25, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Quantum random bit generation using stimulated Raman scattering.

Philip J Bustard1, Doug Moffatt, Rune Lausten

  • 1Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, UK.

Optics Express
|January 26, 2012
PubMed
Summary
This summary is machine-generated.

We developed a quantum random number generator using stimulated Raman scattering in diamond. This novel approach leverages quantum vacuum fluctuations for secure and efficient random number generation.

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Last Updated: May 25, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Published on: April 4, 2016

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Solid-state physics

Background:

  • Random number sequences are essential for cryptography, simulation, and data sampling.
  • Existing random number generators face challenges in security and efficiency.
  • Quantum phenomena offer a path to truly unpredictable random number generation.

Purpose of the Study:

  • To introduce a novel quantum random number generator (QRNG).
  • To utilize quantum noise amplification via stimulated Raman scattering.
  • To demonstrate a robust and efficient QRNG implementation.

Main Methods:

  • Generating Stokes light via amplification of vacuum fluctuations using stimulated Raman scattering.
  • Measuring the phase of the generated Stokes light.
  • Implementing the QRNG using optical phonons in bulk diamond.

Main Results:

  • Demonstrated a quantum random number generator based on phase measurement of amplified vacuum fluctuations.
  • Achieved robustness to classical pump noise through phase measurement.
  • Enabled generation of multiple bits per measurement due to high signal-to-noise ratio.

Conclusions:

  • The developed QRNG offers a secure and efficient method for generating random numbers.
  • The use of phase measurement enhances noise resilience and data output.
  • This implementation showcases the potential of quantum noise amplification in solid-state systems for practical applications.