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Q: Fachverband Quantenoptik und Photonik

Q 35: Quantum Computing and Simulation IV

Q 35.4: Talk

Wednesday, March 4, 2026, 15:30–15:45, P 10

Enhanced loading of ¹⁷¹Yb in optical tweezer arrays for Quantum Computing — •Clara Schellong¹, Jonas Rauchfuß¹, Till Schacht¹, Ben Michaelis¹, Paul Callsen¹, Tobias Petersen¹, Nejira Pintul¹, Christoph Becker^1,2, and Klaus Sengstock^1,2 — ¹Center of Optical Quantum Technologies University of Hamburg, Luruper Chaussee 149, 22761 Hamburg — ²Institute for Quantum Physics University of Hamburg, Luruper Chaussee 149, 22761 Hamburg

Neutral atoms in optical tweezer arrays emerge as one of the most promising platforms for quantum computing, simulation, and metrology. In this talk, we present our experimental progress towards a quantum computing and simulation platform using Ytterbium (Yb) as a qubit resource, focusing on the deterministic loading of single atoms. In our experiment, we trap individual ¹⁷¹Yb atoms in an array of tweezers at 759 nm, that is magic not only for the clock states ¹S₀ and ³P₀ but also for the ³P₁, m_F =-1/2 state, relevant for cooling and detection. A key step for this platform is the defect-free preparation of these arrays. It is well known that light pulses blue-detuned to the ¹S₀ - ³P₁ transition can induce light-assisted collisions that allow for enhanced loading probabilities of single atoms into tweezers. In our setup, we observe single-atom loading with over 80% efficiency using pulses red-detuned to the cooling transition. We characterize the influence of experimental parameters, like tweezer depth and magnetic field, identifying optimal conditions for frequencies red-detuned to the AC Stark and Zeeman shifted resonance of the F=3/2, m_F=-1/2 state.

Keywords: Optical Tweezer Arrays; Quantum Computing; Enhanced Loading; Light-Assisted Collisions