Title: Optimal quantum control for superconducting qubits

Summary: Initially pioneered in the field of spin resonance and AMO physics, optimal quantum control can also be applied to superconducting qubits. This application presents its own challenges, particularly regarding the need to have a very accurate model of the qubit system. This talk will introduce the theory of optimal control and show several types of applications: Optimal control as a tool for discovering 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 enables improvement and debugging of hardware platforms [3]. Ultimately, we will speculate on how quantum control can bring the paradigms of quantum simulation, adiabatic quantum computing, and gate-based quantum computing under one big tent.

Papers:
– Systems for combating diabaticities by DRAG controls: status after 10 years (a)
LS Theis, F Motzoi, S Machnes, FK Wilhelm
EPL (Lettres Europhysiques) 123 (6), 60001

– A set of integrated tools for the control, calibration and characterization of quantum devices applied to superconducting qubits
N Wittler, F Roy, K Pack, M Werninghaus, AS Roy, DJ Egger, S Filipp, …
arXiv preprint arXiv:2009.09866

– Reducing leakage in fast superconducting qubit gates via optimal control
M Werninghaus, DJ Egger, F Roy, S Machnes, FK Wilhelm, S Filipp
npj Quantum Information 7 (1), 1-6

—

The Quantum Computing Seminar Series is a deep dive into various academic and research topics within the quantum community. It will feature community members and leaders every Friday at noon EDT.

Please take the opportunity to connect and share this video with your friends and family if you find it useful.