SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 43: QI Poster II (joint session QI/Q)
Q 43.65: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Apparatus design for scalable cryogenic trapped-ion quantum computing experiments — •Lukas Kilzer, Tobias Pootz, Celeste Torkzaban, Timko Dubielzig, and Christian Ospelkaus — Institute of Quantum Optics, Leibniz University Hannover
Further progress in trapped-ion quantum computing requires a dramatic increase in the number of ion qubits that can interact with each other. We describe the design of cryogenic demonstrator machines for this task, focusing on the implementation of surface-electrode ion traps. Trap design and implementation is facilitated through the use of a universal interchangeable socket. The apparatus design is based on a vibration isolated cold head to cool a cryogenic vacuum system to temperatures around 5K. The apparatus features a high density of DC control lines to support transport of qubits through complex processor structures including junctions, dedicated storage, detection and manipulation registers. Multi-qubit quantum gates can be implemented through the use of chip-integrated microwave methods. Two setups are currently under construction, the first being based on 9Be+ qubits and 40Ca+ ions for sympathetic cooling; the second setup will be based on 43Ca+ qubits and 88Sr+ cooling ions. The first setup will benefit from our experience with the 9Be+ qubit, whereas the second setup with longer wavelengths for cooling and detection will be amenable for integrated chip-integrated photonics. The system has been designed to accommodate the integration of new components for scaling as the development of the underlying enabling technologies progresses.