Optimally controlled quantum discrimination and estimation
Daniel Basilewitsch, Haidong Yuan, Christiane P. Koch
Abstract
Quantum discrimination and estimation are pivotal for many quantum technologies, and their performance depends on the optimal choice of probe state and measurement. Here we show that their performance can be further improved by suitably tailoring the pulses that make up the interferometer. Developing an optimal control framework and applying it to the discrimination and estimation of a magnetic field in the presence of noise, we find an increase in the overall achievable state distinguishability. Moreover, the maximum distinguishability can be stabilized for times that are more than an order of magnitude longer than the decoherence time.
Topics & Concepts
Quantum decoherenceQuantumNoise (video)InterferometryComputer scienceControl theory (sociology)State (computer science)Quantum sensorEstimationStatistical physicsPhysicsControl (management)AlgorithmQuantum mechanicsQuantum computerQuantum networkEngineeringArtificial intelligenceSystems engineeringImage (mathematics)Quantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum Computing Algorithms and Architecture