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HL: Fachverband Halbleiterphysik

HL 50: Materials and devices for quantum technology III

HL 50.10: Vortrag

Freitag, 31. März 2023, 12:15–12:30, JAN 0027

Physical Integration of Cryogenic Control Electronic Together with a Spin Qubit Sample at mK Temperatures — •Lea-Marie Schreckenberg¹, Patrick Vliex¹, René Otten², and Stefan van Waasen^1,3 — ¹Central Institute of Engineering, Electronics and Analytics, Electronic Systems, Forschungszentrum Jülich GmbH, Jülich, Germany — ²JARA Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany — ³Faculty of Engineering, Communication Systems, University of Duisburg-Essen, Germany

A universal quantum computer requires the control and read out of millions of physical quantum bits (qubits). Due to wiring limitation in current state-of-the-art dilution refrigerators scaling up to millions of qubits with room-temperature electronics is challenging. Integrated Circuits (ICs) operating next to the qubits will help solving this scalability problem but require novel approaches for cryogenic circuits. This talk will focus on the physical design layer of the integration of a custom-designed 65nm CMOS low-power digital to analog converter (DAC) for qubit bias together with a spin qubit sample. In total, eight DAC channels are integrated at the mixing chamber stage of a dilution refrigerator and are operated at milli-kelvin temperatures. Additionally, engineering aspects regarding the sample space setup, cryostat wiring and the tight density are pointed out.