Quantum 2025 – wissenschaftliches Programm

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MON: Monday Contributed Sessions

MON 6: QIP Implementations: Trapped Ions

MON 6.7: Vortrag

Montag, 8. September 2025, 15:45–16:00, ZHG007

Efficient simulation workflow for micro-structured planar Paul traps — •Kais Rejaibi, Dorna Niroomand, Patrick Huber, and Christof Wunderlich — Department of Physics, School of Science and Technology University of Siegen, 57068 Siegen, Gemany

Trapped-ion experiments require precise control of ion motion, minimal micromotion, and stable quantum state manipulation. To support this, we developed a simulation workflow based on the Boundary Element Method (BEM), which accurately models electric fields from complex electrode layouts, including junction-type planar Paul traps and designs using Magnetic Gradient Induced Coupling (MAGIC). The method handles open boundary conditions efficiently and is suitable for iterative design.

We use a solid harmonics decomposition to analyze the simulated fields. This helps us to identify and to reduce higher-order multipole components that can cause residual micromotion. In addition, we can add specific higher-order components in a controlled way to create interaction patterns for many-body quantum systems, for instance by shaping the effective J-coupling matrix between ions.

This approach-combining simulation, field analysis, and voltage control-helps us design planar Paul traps that support reliable ion transport through regions with varying magnetic fields. It improves design efficiency and supports the development of more capable systems for quantum information experiments.

Keywords: Ion Traps; Solid Spherical Harmonics; Boundary Elements Method; Shuttling; Many-body quantum systems