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Extracting the photon indistinguishability error from measurable quantum observables
Franciscus H. B. Somhorst, Jason Saied, Eleanor G. Rieffel, Jelmer J. Renema·October 2, 2025·DOI: 10.1088/1367-2630/ae2bf4
Quantum Physicsphysics.optics
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Abstract
We present a method to extract the photon indistinguishability error from Hong-Ou-Mandel interference measurements, accounting for the combined effects of loss and multiphoton noise that contaminate the single-photon Hilbert space. Our analysis resolves apparent inconsistencies in previous interpretations of such measurements. The reported method applies to a wide range of single-photon sources, including quantum dots.