Bias in Error-Corrected Quantum Sensing
Ivan Rojkov, David Layden, Paola Cappellaro, Jonathan Home, Florentin Reiter
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.
Topics & Concepts
Quantum decoherenceSensitivity (control systems)Quantum error correctionQuantumPhysicsQuantum sensorSIGNAL (programming language)Computer scienceStatistical physicsQuantum mechanicsQuantum computerOpen quantum systemQuantum technologyElectronic engineeringEngineeringProgramming languageQuantum Information and CryptographyQuantum Mechanics and ApplicationsDiamond and Carbon-based Materials Research