Subtractive mode intensity interferometry?

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SUMMARY

The discussion centers on the concept of subtractive mode intensity interferometry as an alternative to traditional methods used in Hanbury-Brown and Twiss (HBT) experiments. It proposes that by subtracting intensity signals from two detectors, one could observe a transition from RMS noise addition at greater distances to a null result when the detectors are nearly coincident. While this approach may not be optimal, the feasibility of its implementation is questioned and explored.

PREREQUISITES
  • Understanding of Hanbury-Brown and Twiss (HBT) experiments
  • Knowledge of intensity interferometry principles
  • Familiarity with noise analysis in signal processing
  • Basic concepts of detector alignment and spatial correlation
NEXT STEPS
  • Research the mathematical framework of intensity interferometry
  • Explore noise characteristics in signal subtraction techniques
  • Investigate practical implementations of subtractive signal processing
  • Examine case studies of HBT experiments and their variations
USEFUL FOR

Physicists, optical engineers, and researchers interested in advanced signal processing techniques and experimental setups in interferometry.

Swamp Thing
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In the Hanbury-Brown and Twiss (HBT) family of experiments, they multiply the intensity signals from two detectors. Instead, what if we subract the signals? In this case, we should see the RMS type noise addition when the detectors are far apart, decreasing to a null when the detectors are nearly coincident. This may not be optimal, but would it work at all?
 

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