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Q: Fachverband Quantenoptik und Photonik

Q 23: Quantum Information I

Q 23.6: Poster

Dienstag, 15. März 2022, 16:30–18:30, P

Apparatus design for three new cryogenic trapped-ion quantum computing experiments — •Lukas Kilzer, Tobias Pootz, Celeste Torkzaban, Timko Dubielzig, and Christian Ospelkaus — Institut for 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, development of more integrated systems including optical waveguides, and sympathetic cooling provided by a secondary ion species to keep qubits cold without destroying their stored quantum state. We aim in our next generation of cryogenic trapped ion quantum computers to be able to engineer interactions between dozens of qubits, implement sympathetic cooling, and incrementally test and characterize new components necessary for further scaling. This poster will provide an overview of the design for the cryostats and elaborate on particular design challenges faced while integrating components developed by several other teams. Each cryostat will house a cryogenic inner vacuum chamber inside a room-temperature outer vacuum chamber, a socket-mounted surface RF trap, a cryogenic RF resonator, a cryogenic Schwarzschild objective for detecting ion fluorescence, a vibration isolation system protecting the experiment from vibrations of the cold head, feedthroughs for hundreds of DC lines and several high frequency lines, and extra space for the future integration of optical fibers. These experiments are being developed in collaboration with other research groups at LUH, the University of Siegen, TU Braunschweig, and PTB.