Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 13: Posters: Quantum Optics and Photonics I

Q 13.65: Poster

Montag, 9. März 2020, 16:30–18:30, Empore Lichthof

Estimating Error Rates of a Quantum Error Correction Code from its Syndromes — •Thomas Wagner, Martin Kliesch, Hermann Kampermann, and Dagmar Bruß — Heinrich-Heine-Universität Düsseldorf, Institute for Theoretical Physics 3

For near-term quantum devices, a precise characterization of the errors afflicting the device is crucial. Such a characterization can be used in quantum error correction to optimize decoders for the errors at hand, which significantly improves their performance. Information about the errors is usually obtained by benchmarking the device during calibration. However, for some quantum error correction codes it has been recently demonstrated that the syndrome statistics of the code itself also provides information about the errors. This is particularly interesting for online estimation of time varying error rates. In this work, we analytically characterize when parameters of a noise model can be identified from the syndrome statistics alone. Furthermore, we test numerical methods to perform this estimation in practice.