Work

Characterization of inner control electrode shapes for multi-layer surface-electrode ion traps

Year: 2026

Type: article

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.

Source: Quantum Science and Technology

DOI: 10.1088/2058-9565/ae917b

Authors: Florian Ungerechts, Brigitte Kaune, Christian Ospelkaus

Institutions: Leibniz University Hannover, Physikalisch-Technische Bundesanstalt, Federal Institute For Materials Research and Testing

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,895

Funders: European Commission, Deutsche Forschungsgemeinschaft