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QI: Fachverband Quanteninformation

QI 13: Quantum Control

QI 13.10: Vortrag

Mittwoch, 11. März 2026, 17:45–18:00, BEY/0245

Applications of dynamical decoupling to qubit noise suppression — •Chun Kit Dennis Law¹, Francisco Andrés Cárdenas-López², and Felix Motzoi³ — ¹Peter Grünberg Institute, Forschungszentrum Jülich, Institute of Quantum Control (PGI-8), D-52425 Jülich, Germany — ²Peter Grünberg Institute, Forschungszentrum Jülich, Institute of Quantum Control (PGI-8), D-52425 Jülich, Germany — ³Peter Grünberg Institute, Forschungszentrum Jülich, Institute of Quantum Control (PGI-8), D-52425 Jülich, Germany

Noises are one of the major sources of the high error rates in the operation of modern quantum devices. Dynamical decoupling are some of the earliest experimentally demonstrated and least resource-intensive methods to suppress errors. We construct a many-level quantum system and isolate the lowest two energy levels for information processing. Upon the introduction of noise, we investigate how effective the XY4 sequence is by studying the associated leakage and the fidelity concerning the lowest two energy levels. Time permitting, we also investigate the effects of modifying the pulse shape by DRAG (derivative removal by adiabatic gate), which has been successfully applied to superconducting qubits to reduce leakage and phase errors.

Keywords: Quantum Noise; Dynamical decoupling; Pulse shaping