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MA: Fachverband Magnetismus

MA 18: Transport: Quantum Coherence and Quantum Information Systems - Theory (jointly with MA, HL)

MA 18.2: Vortrag

Dienstag, 21. März 2017, 09:45–10:00, HSZ 103

Tunable, Flexible and Efficient Optimization of Control Pulses for Superconducting Qubits, part I - Theory — •Shai Machnes^1,2, Elie Assémat¹, David Tannor², and Frank Wilhelm¹ — ¹Theoretical Physics, Saarland University, 66123 Saarbrücken, Germany — ²Weizmann Institute of Science, 76100 Rehovot

Quantum computation places very stringent demands on gate fidelities, and experimental implementations require both the controls and the resultant dynamics to conform to hardware-specific ansatzes and constraints. Superconducting qubits present the additional requirement that pulses have simple parametrizations, so they can be further calibrated in the experiment, to compensate for uncertainties in system characterization. We present a novel, conceptually simple and easy-to-implement gradient-based optimal control algorithm, GOAT [1], which satisfies all the above requirements.

In part II we shall demonstrate the algorithm’s capabilities, by using GOAT to optimize fast high-accuracy pulses for two leading superconducting qubits architectures - Xmons and IBM’s flux-tunable couplers.

[1] S. Machnes, D.J. Tannor, F.K. Wilhelm and E. Assémat, ArXiv 1507.04261 (2015)