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Experimental Shot-by-Shot Estimation of Quantum Measurement Confidence.
Ivan A Burenkov1,2, N Fajar R Annafianto2, M V Jabir2
1Joint Quantum Institute and University of Maryland, College Park, Maryland 20742, USA.
Physical Review Letters
|February 11, 2022
Summary
We developed a method for single-shot confidence estimation in quantum measurements. This technique accurately predicts individual quantum outcomes, outperforming classical methods.
Area of Science:
- Quantum Information Science
- Quantum Measurement Theory
Background:
- Quantum measurements are inherently probabilistic.
- Estimating the confidence of individual quantum measurement outcomes is crucial for quantum technologies.
Purpose of the Study:
- To demonstrate single-shot confidence estimation for individual quantum measurement outcomes.
- To apply continuous measurement theory to the quantum state identification problem.
Main Methods:
- Utilized continuous measurement theory within the quantum counting process framework.
- Applied the theory to the quantum state identification problem.
- Experimentally obtained single-shot and average confidences for quantum measurements.
Main Results:
- Achieved single-shot confidence estimation for individual quantum measurement outcomes.
- Demonstrated that experimental confidences favorably compare to idealized classical measurements.
- Validated that single-shot confidence estimations accurately represent experimental outcomes for large ensembles.
Conclusions:
- Single-shot confidence estimation is feasible for quantum measurements.
- The developed method provides a reliable way to assess the certainty of quantum measurement results.
- This advancement has implications for improving the performance of quantum information processing.
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