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Metrology with Unknown Detectors.

Matteo Altorio1, Marco G Genoni2, Fabrizia Somma3

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Summary
This summary is machine-generated.

Achieve optimal precision in metrology by estimating unknown detector performance. This method uses simpler data fitting patterns, avoiding complex calculations for detector characterization.

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Area of Science:

  • Metrology and Measurement Science
  • Quantum Technologies
  • Optical Physics

Background:

  • Detector characterization is crucial for metrology precision but often challenging due to unknown apparatus response.
  • Existing quantum technology-based characterization methods require intensive data processing.
  • Classical coherence phenomena also benefit from advanced detector characterization techniques.

Purpose of the Study:

  • To introduce a simpler method for estimating the Cramér-Rao bound of unknown detectors.
  • To demonstrate the application of this method in polarimetry.
  • To provide a calculation tool for continuous-variable quantum state estimation.

Main Methods:

  • Utilizing data fitting patterns for detector characterization.
  • Estimating the Cramér-Rao bound without prior knowledge of detector response.
  • Applying the formalism to polarimetry and quantum harmonic oscillator state estimation.

Main Results:

  • A simplified approach to estimating detector performance bounds.
  • Successful application in polarimetric measurements.
  • Demonstrated utility in continuous-variable quantum estimation problems.

Conclusions:

  • Data fitting patterns offer an accessible method for characterizing unknown detectors.
  • The developed formalism enhances precision in metrology and quantum state estimation.
  • This approach simplifies complex detector characterization tasks in classical and quantum regimes.