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Speaker: Tommaso Calarco, Institute for Quantum Control, Peter Grünberg Institute at Forschungszentrum Jülich
Abstract: Developing quantum technologies towards practical application requires exquisite control of the dynamics of multiqubit systems. Quantum optimal control offers a natural, and increasingly widespread, way to achieve this to the maximum possible extent. I will introduce the optimal control method we developed for quantum many-body systems and its remote closed-loop implementation RedCRAB, and I will report recent results we obtained with it in various physical contexts from diamond color centres to atoms in optical trap arrays, where we demonstrated optimal preparation of a 20-qubit GHZ state as well as single-atom spatial superposition states at the quantum speed limit. I will also put these specific efforts in the more global context of the European Quantum Technologies activities, including recent developments towards scientific cooperation with the US.