Learning logical Pauli noise in quantum error correction
Abstract
The characterization of quantum devices is crucial for their practical implementation but can be costly in experimental effort and classical postprocessing. Therefore, it is desirable to measure only the information that is relevant for specific applications and develop protocols that require little additional effort. In this work, we focus on the characterization of quantum computers in the context of stabilizer quantum error correction. For arbitrary stabilizer codes, subsystem codes, and data syndrome codes, we prove that the logical error channel induced by Pauli noise can be estimated from syndrome data under minimal conditions. More precisely, for any such code, we show that the estimation is possible as long as the code can correct the noise.
Cite
@article{arxiv.2209.09267,
title = {Learning logical Pauli noise in quantum error correction},
author = {Thomas Wagner and Hermann Kampermann and Dagmar Bruß and Martin Kliesch},
journal= {arXiv preprint arXiv:2209.09267},
year = {2023}
}
Comments
5+8 pages; v2: close to published version