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 A74: Spin Qubit Arrays I
8:00 AM–11:00 AM,
Monday, March 6, 2023
Room: Room 403/404
Sponsoring
Unit:
DQI
Chair: Andre Saraiva, Diraq
Abstract: A74.00005 : Reliable Fabrication of Multi-Spin Qubit Devices in 28Si/SiGe Heterostructures
9:12 AM–9:24 AM
Presenter:
Larysa Tryputen
(TNO Netherlands Organization for Applied Scientific Research)
Authors:
Sergey V Amitonov
(TNO, QuTech)
Larysa Tryputen
(TNO Netherlands Organization for Applied Scientific Research)
Amir Sammak
(TNO, Qutech)
Saurabh Karwal
(TNO/QuTech)
Önder Gül
(TNO, QuTech)
Yoram Vos
(TNO, QuTech)
Tumi Makinwa
(TNO, Qutech)
Rick N Wasserman
(TNO, QuTech)
Delphine B Brousse
(TNO, QuTech)
David J Michalak
(TNO, QuTech)
Nodar Samkharadze
(TNO, QuTech)
Giordano Scappucci
(TU Delft QuTech)
Lieven M Vandersypen
(Delft University of Technology)
Rabah Hanfoug
(TNO, QuTech)
Our fabrication flow for the spin qubit devices is split into two parts: the first part is heterostructure growth and optical patterning of ohmics on 4-inch wafers, and the second part involves completion of the device nanofabrication including fine gates on 20x20 mm coupons. We employ a systematic approach of design, fabrication and characterization to provide feedback on the material and device quality at different stages of the fabrication process. For this, we implement on-chip multilayered test structure devices of various types in order to routinely extract different device and material parameters with a standard protocol. Such a split-step approach allows us to develop a high yield process, as well as rapidly experiment with gate designs, materials and individual process steps.
The highlights of devices made with this process include a two-qubit quantum processor yielding T2* of up to 20 µs and 99.6% two-qubit gate fidelity [1], the first online two spin qubit processor [2], and a universally controlled six spin qubit quantum processor [3].
[1] Xue et al., Nature 601, 343 (2022).
[2] https://www.quantum-inspire.com/
[3] Philips et al., Nature 609, 919 (2022).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700