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Q: Fachverband Quantenoptik und Photonik
Q 64: Poster – Ultra-cold atoms, ions and BEC (joint session A/Q)
Q 64.4: Poster
Thursday, March 5, 2026, 17:00–19:00, Philo 1. OG
QRydDemo - Architecture for Dynamic Tweezer Arrays — •Ralf Berner1,2, Christopher Bounds1,2, Manuel Morgado1,2, Govind Unnikrishnan1,2, Achim Scholz1,2, Jiachen Zhao1,2, Julia Hickl1,2, Maximilian Kob1,2, Sebastian Weber3,2, Hans-Peter Büchler3,2, Simone Montangero4, Christoph Tresp5, Jürgen Stuhler5, Tilman Pfau1,2, and Florian Meinert1,2 — 15th Inst. of Physics, University of Stuttgart — 2IQST — 3Inst. for Theoretical Physics III, University of Stuttgart — 4Inst. for Complex Quantum Systems, University of Ulm — 5TOPTICA Photonics AG
Within the QRydDemo project, we aim to realize a neutral Rydberg atom quantum computer exploiting the Fine-Structure (FS) qubit in 88Sr atoms trapped in optical tweezers. To this end, we demonstrate a novel type of dynamic tweezer architecture consisting of 20 Acusto-Optical Deflectors (AODs) operating at 592 nm, which are individually driven by up to 64 independent Radio-Frequency (RF) tones, enabling array sizes of up to 500 qubits.
This platform, together with fast image analysis and independent real-time RF-control of the AODs, provides the capability of parallel line sorting with an unprecedented dynamical connectivity, which we can utilize for fast sorting and mid-circuit rearrangement of individual atoms at timescales within the coherence time of the qubits.
We present our work on achieving single atom loading and cooling with a scheme that sequentially addresses red sidebands of the narrow intercombination line in strontium via a frequency chirp. This paves the way towards the generation of large, defect-free arrays of qubits.
Keywords: Dynamic tweezer arrays; Fast atom sorting; Rydberg atom; Fine-Structure qubit