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Q: Fachverband Quantenoptik und Photonik
Q 15: Atom and Ion Qubits (joint session QI/Q)
Q 15.6: Vortrag
Montag, 10. März 2025, 18:30–18:45, HS II
Optimizing the circularization of Rydberg atoms — •Matthias Hüls1,2, Robert Zeier1, Eloisa Cuestas1, Felix Motzoi1,2, and Tommaso Calarco1,2,3 — 1Forschungszentrum Jülich GmbH, Quantum Control (PGI-8), Jülich, Germany — 2University of Cologne, Institute for Theoretical Physics, Köln, Germany — 3Università di Bologna, Dipartimento di Fisica e Astronomia, Bologna, Italy
Atoms in Circular Rydberg states, with a large principal quantum number n and maximal magnetic quantum number m = n−1, exhibit long state lifetimes and strong, long-range interactions. This renders them a promising platform for quantum simulation and quantum sensing. Yet their preparation is complex and includes a multi-state transfer through a large Rydberg state manifold of dimension n2 driven by the interaction with radio frequency (RF) pulses. Pulse shapes that achieve the latter with a high fidelity can be designed using optimal control techniques and have enabled a fast and precise circularization of non-interacting atoms in the experiment [1]. With the aim of constructing pulses suitable to circularize arrays of interacting Rydberg atoms, we extend this previous efforts by additional field terms and optimization methods. Further, we study how interactions between atoms affect the performance of current optimized pulses. We therefore build a simulation of the experiment and subsequently use it to optimize RF pulse shapes. [1] Larrouy A, Patsch S, Richaud R, Raimond J-M, Brune M, Koch CP, Gleyzes S. Fast navigation in a large Hilbert space using quantum optimal control. PRX.10:021058 (2020)
Keywords: Quantum Control; Rydberg Systems; Circular Rydberg states