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A: Fachverband Atomphysik

A 38: Trapped Ions (joint session Q/A)

A 38.2: Vortrag

Freitag, 15. März 2024, 11:30–11:45, HS 1199

Apparatus design for scalable cryogenic trapped-ion quantum computing experiments — •Tobias Pootz¹, Lukas Kilzer¹, Celeste Torkzaban¹, and Christian Ospelkaus^{1, 2} — ¹Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — ²Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Future applications for trapped ion quantum computers require a signicant increase in the number of ion qubits and excellent interconnectivity. In my talk I will describe the design of cryogenic demonstrator machines for this task, implementing surface-electrode ion traps mounted on a universal interchangeable socket. The apparatus design is based on a vibration-isolated cold head to cool a cryogenic vacuum system to temperatures below 10 K. The system features several hundred DC control lines to support transport of qubits through dedicated trap structures including junctions, storage, detection and manipulation registers. Multi-qubit quantum gates will be implemented through the use of chip-integrated microwave lines. The system has been designed to accommodate the integration of new components for scaling as the development of the underlying enabling technologies progresses, such as chip integrated waveguides. Multiple setups were built. One setup is based on 9Be+ qubits and 40Ca+ ions for sympathetic cooling; a second setup will be based on 43Ca+ qubits and 88Sr+ cooling ions.

Keywords: Trapped ions; Quantum computing; Microwave gates; Cryogenic; Surface electrode trap