Bias in error-corrected quantum sensing
Quantum Physics
2022-04-20 v2
Abstract
The sensitivity afforded by quantum sensors is limited by decoherence. Quantum error correction (QEC) can enhance sensitivity by suppressing decoherence, but it has a side-effect: it biases a sensor's output in realistic settings. If unaccounted for, this bias can systematically reduce a sensor's performance in experiment, and also give misleading values for the minimum detectable signal in theory. We analyze this effect in the experimentally-motivated setting of continuous-time QEC, showing both how one can remedy it, and how incorrect results can arise when one does not.
Cite
@article{arxiv.2101.05817,
title = {Bias in error-corrected quantum sensing},
author = {Ivan Rojkov and David Layden and Paola Cappellaro and Jonathan Home and Florentin Reiter},
journal= {arXiv preprint arXiv:2101.05817},
year = {2022}
}
Comments
6 + 13 pages, 2 + 8 figures. Comments welcome