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 N72: Semiconductor Qubits: Spin Qubit Measurement II
11:30 AM–2:18 PM,
Wednesday, March 8, 2023
Room: Room 406
Sponsoring
Unit:
DQI
Chair: Sophie Hermans, California Institute of Technology
Abstract: N72.00003 : Design and optimization of a cryogenic CMOS capacitance bridge for readout of silicon spin qubits*
11:54 AM–12:06 PM
Author not Attending
Presenter:
Ryan H Foote
(Université de Sherbrooke)
Authors:
Ryan H Foote
(Université de Sherbrooke)
Ioanna Kriekouki
(STMicroelectronics)
Claude Rohrbacher
(Université de Sherbrooke)
Alexandre Bédard-Vallée
(Université de Sherbrooke)
Philippe Galy
(STMicroelectronics)
Dan Deptuck
(CMC Microsystems)
Gayathri Singh
(CMC Microsystems)
Nicolas Roy
(Université de Sherbrooke)
Michel Pioro-Ladrière
(Université de Sherbrooke)
Jean-François Pratte
(Université de Sherbrooke)
One promising approach to mitigate this problem is to leverage the considerable experience of the semiconductor manufacturing industry to co-integrate control electronics with quantum dot qubits hosted in silicon. This allows for long-demonstrated classical circuits to exist on the same chip with quantum structures to significantly improve throughput and readout sensitivity while reducing the amount of necessary control lines.
Here we present results demonstrating the operation of a CMOS capacitance bridge suitable for readout of silicon spin qubits. We show sensitivity approaching the attofarad regime for a simplified circuit below 4 K using two different technology nodes - 28nm Fully Depleted Silicon On Insulator (FD-SOI) from STMicroelectronics and TSMC 180nm via CMC Microsystems. We also present simulations for an optimized bridge with attofarad sensitivity capable of operating over a large range of frequencies.
*We would like to acknowledge support from the FRQNT of Québec, STMicroelectronics, and CMC Microsystems and Canada’s National Design Network (CNDN). This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund.
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