Experimental Shot-by-Shot Estimation of Quantum Measurement Confidence

We demonstrate the single-shot confidence estimation for individual quantum measurement outcomes using the continuous measurement theory of the quantum counting process applied to the quantum state identification problem. We experimentally obtain single-shot and average confidences for quantum measu...

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Bibliographic Details
Published in:Physical review letters 2022-01, Vol.128 (4), p.040404-040404, Article 040404
Main Authors: Burenkov, Ivan A, Annafianto, N Fajar R, Jabir, M V, Wayne, Michael, Battou, Abdella, Polyakov, Sergey V
Format: Article
Language:English
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Summary:We demonstrate the single-shot confidence estimation for individual quantum measurement outcomes using the continuous measurement theory of the quantum counting process applied to the quantum state identification problem. We experimentally obtain single-shot and average confidences for quantum measurements and show that they favorably compare to that of the idealized classical measurement. Finally, we demonstrate that single-shot confidence estimations correctly represent observed experimental outcomes for a large ensemble of measurements.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.128.040404