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Optimal quantum control for superconducting qubits
Wilhelm-Mauch, Frank - Universität des Saarlandes
Presentation on Thursday, March 25, 2021, noon
Location: Virtual Seminars over Zoom Until Further Notice
Originally pioneered in spin resonance and AMO physics, optimal quantum control can also be applied to superconducting qubits. This application has its own challenges, specifically in the requirement of having a very accurate model of the qubit system at hand. This talk will introduce optimal control theory and show several types of applications: Optimal control as a tool for discovery of analytical techniques [1], as a tool for determining speed limits and resource estimates, and the integration of control with benchmarking and system identification [2], which allows improvement and debugging of hardware platforms [3]. In the end, we will speculate, how quantum control can bring together the paradigms of quantum simulation, adiabatic quantum computing, and gate-based quantum computing under one big tent.
[1] Theis, L. S., Motzoi, F., Machnes, S., and Wilhelm, F.K. "Counteracting systems of diabaticities using DRAG controls: The status after 10 years. EPL 123 (6) 60001.
[2] Wittler, N., Roy, F., Pack, K., Werninghaus, M., Roy, A. S., Egger, D. J., Filipp, S., Wilhelm, F. K., Machnes, S. "An integrated tool-set for Control, Calibration and Characterization of quantum devices applied to superconducting qubits" arXiv:2009.09866.
[3] Werninghaus, M., Egger, D. J., Roy, F., Machnes, S., Wilhelm, F. K., Filipp, S. "Leakage reduction in fast superconducting qubit gates via optimal control." npj Quantum Information 7 (1), 1-6.