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Updated: Oct 12, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Complete Incompatibility, Support Uncertainty, and Kirkwood-Dirac Nonclassicality

Stephan De Bièvre1

  • 1Univ. Lille, CNRS, Inria, UMR 8524 - Laboratoire Paul Painlevé, F-59000 Lille, France.

Physical Review Letters
|November 19, 2021
PubMed
Summary

We introduce complete incompatibility for quantum observables, linking it to state uncertainty. This finding helps classify quantum states as classical or nonclassical using the Kirkwood-Dirac distribution.

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