Reducing an object’s classical scattering strength does not guarantee its quantum invisibility, as a detectable parameter imprint can still survive in the detected light. The analysis reveals classical scattering, scaling with ∣sm∣2, differs from quantum sensitivity, which scales with ∣∂θsm∣2, demonstrating diminished amplitude does not equate to eliminated sensitivity. This establishes a new criterion for quantum undetectability, demanding dete…
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