Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 19: Quantum Technologies – Ion Traps
Q 19.6: Vortrag
Dienstag, 3. März 2026, 12:15–12:30, P 5
Enhancing Trapped Ion Quantum Processor Scalability via Integrated Photonics and Microwave Technology — •Mohammad Masum Billah1, 2, Florian Ungerechts1, Rodrigo Munoz1, Phil Nuschke1, Janina Bätge1, Axel Hoffmann1, 4, Giorgio Zarantonello1, 3, Celeste Torkzaban1, and Christian Ospelkaus1, 2, 5 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Laboratorium für Nano- und Quantenengineering, Leibniz Universität Hannover — 3QUDORA Technologies GmbH — 4Institut für Hochfrequenztechnik und Funksysteme, Leibniz Universität Hannover — 5Physikalisch- Technische Bundesanstalt
Scalability is a critical requirement for performing meaningful computations with trapped-ion quantum processors. Microfabricated surface-electrode ion traps have demonstrated considerable potential to implement the scalable Quantum Charged Coupled Device (QCCD) architecture. However, reliance on free-space laser delivery poses a substantial challenge to expanding these systems. In our research, we explore laser-free gate operations using oscillating microwave magnetic field gradient for chip-integration of the gate mechanism. To achieve comprehensive scalability, photonics integration is essential for delivering, preparation and detection light via optical waveguides and grating out-couplers directly from the trap surface. Our study focuses on optimizing the placement of integrated light sources considering key factors such as light polarization and phase, opto-electrical effects, impacts on the trapping potential, optical crosstalk, thus addressing key challenges to facilitate scalable trapped-ion quantum computing.
Keywords: Trapped Ion Quantum Processor; Integrated photonics; grating coupler; microwave; microfabrication