Optimizing RF Readout for Silicon Spin Qubits in an Access Array

Efficient and scalable qubit readout is a critical requirement for realizing quantum computing. Radio frequency (RF) readout emerges as a promising candidate due to its high speed and multiplexing capabilities. In this study, we employ a 2-D access array to significantly reduce the number of control lines needed per qubit for readout. We demonstrate frequency-domain multiplexing (FDM) and simultaneous readout at two distinct frequencies in a semiconductor quantum device. Optimizations in circuit design, device proximity, power levels, and RF readout frequency enhanced the signal-to-noise ratio (SNR) by an order of magnitude. Despite these advancements, challenges such as bandwidth overlap persist, which can impact the scalability of FDM. Our findings highlight both the potential and the limitations of RF readout in scalable quantum computing systems.

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Publication Details

Journal
IEEE Transactions on Instrumentation and Measurement
Published
2025-01-01
DOI
https://doi.org/10.1109/tim.2025.3595606
Primary Topic
Quantum and electron transport phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

Optimizing RF Readout for Silicon Spin Qubits in an Access Array

Benoît Bertrand, Yatao Peng, Edoardo Charbon, Andrea Ruffino et al.
IEEE Transactions on Instrumentation and Measurement
Quantum and electron transport phenomena
article

Optimizing RF Readout for Silicon Spin Qubits in an Access Array

Benoît Bertrand, Yatao Peng, Edoardo Charbon, Andrea Ruffino, M. Fernando González-Zalba, John Michniewicz, Louis Hutin, Tsung-Yeh Yang
article en

Abstract

Efficient and scalable qubit readout is a critical requirement for realizing quantum computing. Radio frequency (RF) readout emerges as a promising candidate due to its high speed and multiplexing capabilities. In this study, we employ a 2-D access array to significantly reduce the number of control lines needed per qubit for readout. We demonstrate frequency-domain multiplexing (FDM) and simultaneous readout at two distinct frequencies in a semiconductor quantum device. Optimizations in circuit design, device proximity, power levels, and RF readout frequency enhanced the signal-to-noise ratio (SNR) by an order of magnitude. Despite these advancements, challenges such as bandwidth overlap persist, which can impact the scalability of FDM. Our findings highlight both the potential and the limitations of RF readout in scalable quantum computing systems.

IEEE Transactions on Instrumentation and MeasurementVol. 74
University of Macau (MO), University of Cambridge (GB), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Hitachi (United Kingdom) (GB), Quantum Motion Technologies (United Kingdom) (GB), Laboratoire d'Électronique des Technologies de l'Information (FR), École Polytechnique Fédérale de Lausanne (CH)
Engineering and Physical Sciences Research Council
Affordable and clean energy
Openalex Percentile: Top 85%
Quantum and electron transport phenomena
DOISourceOpenAlex
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Optimizing RF Readout for Silicon Spin Qubits in an Access Array — Benoît Bertrand, Yatao Peng, et al. · IEEE Transactions on Instrumentation and Measurement (2025) | TGRS Research Map | TGRS