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A: Fachverband Atomphysik

A 17: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)

A 17.3: Talk

Wednesday, March 4, 2026, 15:15–15:30, N 1

Fast Parallel Atom Sorting for a Rydberg Atom Quantum Computer Demonstrator — •Achim Scholz^1,2, Christopher Bounds^1,2, Manuel Morgado^1,2, Govind Unnikrishnan^1,2, Ralf Berner^1,2, Jiachen Zhao^1,2, Julia Hickl^1,2, Maximilian Kob^1,2, Sebastian Weber^3,2, Hans-Peter Büchler^3,2, Simone Montangero⁴, Christoph Tresp⁵, Jürgen Stuhler⁵, Tilman Pfau^1,2, and Florian Meinert^1,2 — 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

The QRydDemo project aims to realize a Rydberg atom quantum computer demonstrator based on the fine-structure qubit in ⁸⁸Sr. This qubit not only allows for fast single-qubit gates via strong two-photon Raman transitions but also enables triple-magic trapping at an expected wavelength of 592 nm, for both qubit states and the Rydberg state are magically trapped. These conditions are promising for the realization of high-fidelity multi-qubit operations wherefore we employ a novel all electro-optical tweezer setup comprised of 20 AODs at the triple-magic wavelength. Each AOD can realize a 1D-array with up to 64 tones to finally create a 500 qubit array by folding the independent rows with a three-staged step mirror. Utilizing this architecture, we present our progress on single atom loading and cooling, as well as
rearrangement towards sorting and dynamical pattern generation. The availability of fast parallel reshuffling within the qubit coherence time paves the way towards flexible qubit connectivity and operations.

Keywords: Rydberg Atom Quantum Computer; Fine-Structure Qubit; Triple-Magic Trapping; Dynamic Tweezer Array; Atom Sorting