4.6 Article

Neural networks for on-the-fly single-shot state classification

Journal

APPLIED PHYSICS LETTERS
Volume 119, Issue 11, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0065011

Keywords

-

Funding

  1. Australian Research Council Centre of Excellence for Engineered Quantum Systems (EQUS) [CE170100009]
  2. Lockheed Martin Corporation [S19 004]

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The study demonstrates the application of neural networks in single-shot quantum measurement state classification, showing improvement in classification accuracy and the ability to handle experimental imperfections.
Neural networks have proven to be efficient for a number of practical applications ranging from image recognition to identifying phase transitions in quantum physics models. In this paper, we investigate the application of neural networks to state classification in a single-shot quantum measurement. We use dispersive readout of a superconducting transmon circuit to demonstrate an increase in assignment fidelity for both two and three state classifications. More importantly, our method is ready for on-the-fly data processing without overhead or need for large data transfer to a hard drive. In addition, we demonstrate the capacity of neural networks to be trained against experimental imperfections, such as phase drift of a local oscillator in a heterodyne detection scheme.

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