Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M74: Spin Qubit Measurement I
8:00 AM–10:48 AM,
Wednesday, March 8, 2023
Room: Room 403/404
Sponsoring
Unit:
DQI
Chair: Nathan Holman, HRL Laboratories, LLC
Abstract: M74.00012 : Rapid characterisation of over 1000 silicon quantum dots*
10:36 AM–10:48 AM
Presenter:
Mark A Johnson
(Quantum Motion)
Authors:
Mark A Johnson
(Quantum Motion)
Domenic Prete
(Quantum Motion)
Edward J Thomas
(University College London, Quantum Motion)
Mathieu de Kruijf
(University College London, Quantum Motion)
David Ibberson
(Quantum Motion)
Jonathan Warren
(Quantum Motion)
James Kirkman
(Quantum Motion)
Grayson M Noah
(Quantum Motion)
Alberto Gomez Saiz
(Quantum Motion)
John Morton
(University College London, Quantum Motion)
Fernando Gonzalez-Zalba
(Quantum Motion)
The management and quantification of variability associated with quantum device manufacturing is of primary importance to scale quantum computing systems. High-throughput characterization techniques are hence key to correlate aspects of the manufacturing process and device design with statistical evidence of device behaviour. Here, we demonstrate a fast characterisation methodology for silicon-based quantum dot devices, the physical host of spin qubits. We combine high-bandwidth radiofrequency reflectometry techniques with an integrated analogue cryogenic multiplexer to characterise quantum dots devices implemented on an industry standard silicon-on-insulator process. Our optimized approach allows measuring 1024 devices in less than 15 minutes at milliKelvin temperatures. Additionally, our automated parameter extraction routine allows establishing correlations with specific device geometries. Our methodology provides a rapid characterisation technique to assess quantum device variability as well as optimise manufacturing processes and designs.
*This work received support from Innovate UK [106154, 10000965, 10006186]; and the (UK) Engineering and Physical Sciences Research Council [EP/S021582/1]. MGFK acknowledges a UKRI Future Leaders Fellowship [MR/V023284/1]
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