Achieving multi-zone functionality in 3D ion traps with optimal segmentation

Ion trap based quantum processors are proposed to be scaled either by a QCCD architecture using 2D traps with large number of electrodes or photonics interconnected 3D traps. Both have their own pros and cons. Here, we present a multi-segmented 3D ion trap design that is able to perform limited shuttling while being compatible to photonics interconnects. For creating multiple processing zones, advantageous for performing shuttling and swap operations or functioning as memory or measurement zones, we optimized the requirement of segment numbers. Whereas such capability has been demonstrated in micro-fabricated 3D and 2D ion traps that feature several tens of electrodes, we show how 3D Paul traps implemented using electrodes with much fewer segments, hand-assembled under a microscope, may perform similar functions to a limited but useful degree. We demonstrate preliminary results from a seven-segment blade trap, capable of generating three distinct trapping regions. This provides an additional trapping region compared to five-segment electrode traps. Our approach offers an alternate pathway toward multi-zone quantum processors, bridging the gap between single-zone systems and fully integrated surface-electrode architectures required for quantum computing.