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Updated: Jun 8, 2026

Absolute Quantum Yield Measurement of Powder Samples
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Published on: May 12, 2012

Quantum cloning for absolute radiometry.

Bruno Sanguinetti1, Enrico Pomarico, Pavel Sekatski

  • 1Group of Applied Physics, University of Geneva, 20 rue de l'Ecole-de-Médecine, CH-1211 Geneva 4, Switzerland.

Physical Review Letters
|September 28, 2010
PubMed
Summary
This summary is machine-generated.

Quantum information copying fidelity, limited in quantum systems, can directly measure radiated power. This principle enables the development of a practical primary standard for power measurement.

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Area of Science:

  • Quantum physics
  • Metrology

Background:

  • Quantum mechanics dictates that information copying has finite fidelity, approaching 1 as systems become classical.
  • Understanding and quantifying information fidelity is crucial for quantum technologies.

Purpose of the Study:

  • To demonstrate a novel method for directly measuring radiated power using quantum information fidelity.
  • To show the feasibility of developing a practical primary standard based on these quantum principles.

Main Methods:

  • Leveraging the relationship between quantum information copying fidelity and system classicality.
  • Developing a measurement protocol based on fidelity thresholds.

Main Results:

  • Direct measurement of radiated power is achievable by exploiting finite quantum information fidelity.
  • The proposed method forms the basis for a new type of primary standard.

Conclusions:

  • Quantum information fidelity provides a direct route to measuring radiated power.
  • This research paves the way for practical quantum-based metrology standards.