2026/02/27 by Florian Ungerechts, Brigitte Kaune, C. Ospelkaus +1
Chemical Engineering · Chemistry · Engineering · Physics and Astronomy · #Analytical Chemistry and Sensors #Electrochemical Analysis and Applications #Molecular Junctions and Nanostructures #quant-ph
paper · pdf · doi:10.1088/2058-9565/ae917b
arxiv created 2026/02/27 · openalex publication_date 2026/07/28 · openalex created_date 2026/07/29 · arxiv updated 2026/07/30 · openalex updated_date 2026/07/30
Abstract Microfabricated surface-electrode traps are a scalable platform for trapped-ion quantum processors. Recent advances in fabrication techniques have enabled the design of increasingly complex multi-layer structures. Yet the control electrodes remain mostly unchanged and of rectangular shape. We systematically analyze asymmetric inner control electrode shapes for simultaneous axial and radial control in multi-layer surface traps, characterize and compare a selection of different shapes, and verify their capabilities in realistic use-case scenarios for ion transport and micromotion compensation. Eliminating the need for the commonly used additional outer control electrodes, asymmetric inner control electrodes increase the compactness and space efficiency of the individual registers and allow previously unattainable space-efficient layouts for surface-electrode traps, boosting the effective ion density per chip area. Concurrently using solely inner electrodes reduces the number of control signals and improves the control voltage efficiency, easing the requirements
on voltage generation. Collectively, ’all-inner DC’ control enhances the scalability of surface-electrode trapped-ion quantum processors in manifold aspects.