← Back to papers
Bias in Error-Corrected Quantum Sensing.
Ivan Rojkov, David Layden, P. Cappellaro, J. Home, F. Reiter·January 14, 2021·DOI: 10.1103/PhysRevLett.128.140503
PhysicsMedicine
AI Breakdown
Get a structured breakdown of this paper — what it's about, the core idea, and key takeaways for the field.
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.