Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 64: Poster – Ultra-cold atoms, ions and BEC (joint session A/Q)
Q 64.24: Poster
Thursday, March 5, 2026, 17:00–19:00, Philo 1. OG
Fast SLM holography for arbitrary atom transport in neutral atom QPUs. — •Maximilian Kob1,2, Christopher Bounds1,2, Manuel Morgado1,2, Govind Unnikrishnan1,2, Ralf Berner1,2, Achim Scholz1,2, Jiachen Zhao1,2, Julia Hickl1,2, Tilman Pfau1,2, and Florian Meinert1,2 — 15th Inst. of Physics, University of Stuttgart — 2IQST
We report on progress towards a fully dynamical optical tweezer platform employing fast, phase-only spatial light modulators (SLMs) within the QRydDemo demonstrator. Due to intensity flickering along sequences of Gerchberg-Saxton (GS)-based holograms, smooth transitions between frames are generated using the Linear Phase Interpolation (LPI) method [1]. This mitigates losses during transport through light-field phase control. Our control software has been adapted to include a GPU-accelerated implementation of the LPI and to support arbitrary two-dimensional trajectories. The neutral-atom platform based on optical tweezers offers the possibility of 3-dimensional (3D) atom assembly. We compare several methods for generating static 3D holograms and evaluate their suitability for atom transport, supported by optical and dynamical simulations. To enable fully 3D atom transport for sorting and shuttling, we further present an evaluation of the performance of different techniques for generating 3D holograms near kHz timescales.
[1] I. H. A. Knottnerus et. al. SciPost Phys. 19, 118 (2025)
Keywords: Dynamic Tweezer Arrays; Neutral Atom Quantum Computers; 3D Holography; Arbitrary Atom Assembly