Dresden 2026 – scientific programme
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QI: Fachverband Quanteninformation
QI 13: Quantum Control
QI 13.3: Talk
Wednesday, March 11, 2026, 15:30–15:45, BEY/0245
Efficient pulse-sequence optimization method for quantum control under realistic hardware constraints — Marco Dall'Ara1,2, Florentin Reiter1, Thomas Wellens1, Martin Koppenhöfer1, and •Walter Hahn1 — 1Fraunhofer Institute for Applied Solid State Physics IAF, Freiburg, Germany — 2Dipartimento di Fisica e Astronomia G. Galilei & Padua Quantum Technologies Research Center, Università degli Studi di Padova, Padova, Italy
We propose a simple yet efficient pulse-sequence optimization method for controlling quantum systems. The ansatz leads to an efficient exploration of the unitary space without over-parameterization, even when the pulse amplitudes are restricted to a few discrete values suitable for quantum devices. Bandwidth and power limitations of experimental settings can be straightforwardly included with only minor computational overhead. We numerically validate the method by applying it to (i) unitary synthesis of a three-qubit gate and (ii) ground-state preparation on a globally-driven Rydberg-atom platform, and (iii) state transfer in an Ising spin chain. For all problems considered, our method approaches an information-theoretic lower bound on the number of parameters and exhibits advantages when compared to commonly used quantum control algorithms.
Keywords: Quantum optimal control; Pulse optimization; Analogue quantum simulator; Quantum computer