Speaker
Description
We report on progress towards a fully dynamical optical tweezer platform employing a fast, phase-only spatial light modulator (SLM) within the QRydDemo experiment, a neutral-atom quantum computing demonstrator based on the Strontium fine-structure qubit [1,2]. Due to intensity flickering along sequences of Gerchberg–Saxton-based holograms, smooth transitions between frames are generated using the Linear Phase Interpolation (LPI) method. This mitigates losses during transport through light-field phase control and allows for on-SLM sorting of stochastically loaded tweezer arrays [3]. In our control software, we extend the demonstrated framework to allow for arbitrary two-dimensional trajectories.
Additionally, we implement the generation of arbitrary dynamic 3D holograms, evaluating their usability for neutral atom experiments. This forms the basis for direct assembly of trap geometries interesting for quantum simulation & computation and atom transport along arbitrary 3D trajectories, which we implement based on the LPI technique. We show optical generation & volumetric imaging of 3D holograms, and perform first characterizations of the transient behavior of the sequences.
[1] G. Unnikrishnan et al., Phys. Rev. Lett. 132, 150606 (2024).
[2]F. Meinert, T. Pfau, C. Hölzl: EU Patent Application No. EP20214187.5 and US Patent Application 18/267,066
[3] I. H. A. Knottnerus et. al., SciPost Phys. 19, 118 (2025).