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    Rights statement: Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 2020 and may be found at https://doi.org/10.1063/5.0005886 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier. / Schupp, F J; Vigneau, F.; Wen, Yutian et al.

In: Journal of Applied Physics, Vol. 127, 244503, 29.06.2020.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Schupp, FJ, Vigneau, F, Wen, Y, Mavalankar, A, Griffiths, JP, Jones, GAC, Farrer, I, Ritchie, D, Smith, CG, Camenzind, LC, Yu, L, Zumbühl, D, Briggs, GAD & Laird, E 2020, 'Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier', Journal of Applied Physics, vol. 127, 244503. https://doi.org/10.1063/5.0005886

APA

Schupp, F. J., Vigneau, F., Wen, Y., Mavalankar, A., Griffiths, J. P., Jones, G. A. C., Farrer, I., Ritchie, D., Smith, C. G., Camenzind, L. C., Yu, L., Zumbühl, D., Briggs, G. A. D., & Laird, E. (2020). Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier. Journal of Applied Physics, 127, [244503]. https://doi.org/10.1063/5.0005886

Vancouver

Schupp FJ, Vigneau F, Wen Y, Mavalankar A, Griffiths JP, Jones GAC et al. Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier. Journal of Applied Physics. 2020 Jun 29;127:244503. doi: 10.1063/5.0005886

Author

Schupp, F J ; Vigneau, F. ; Wen, Yutian et al. / Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier. In: Journal of Applied Physics. 2020 ; Vol. 127.

Bibtex

@article{765791627fee46e896e0e4d911c275e2,
title = "Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier",
abstract = "Fault-tolerant spin-based quantum computers will require fast and accurate qubit readout. This can be achieved using radio-frequency reflectometry given sufficient sensitivity to the change in quantum capacitance associated with the qubit states. Here, we demonstrate a 23-fold improvement in capacitance sensitivity by supplementing a cryogenic semiconductor amplifier with a SQUID preamplifier. The SQUID amplifier operates at a frequency near 200 MHz and achieves a noise temperature below 600 mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of 0.07 aF/ \sqrt{Hz}. The setup is used to acquire charge stability diagrams of a gate-defined double quantum dot in a short time with a signal-to-noise ration of about 38 in 1 μs of integration time.",
author = "Schupp, {F J} and F. Vigneau and Yutian Wen and A Mavalankar and Griffiths, {J. P.} and Jones, {G. A. C.} and I. Farrer and David Ritchie and Smith, {C. G.} and Camenzind, {L. C.} and L. Yu and Dominik Zumb{\"u}hl and Briggs, {G. Andrew D.} and Edward Laird",
note = "Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 2020 and may be found at https://doi.org/10.1063/5.0005886 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. ",
year = "2020",
month = jun,
day = "29",
doi = "10.1063/5.0005886",
language = "English",
volume = "127",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "AMER INST PHYSICS",

}

RIS

TY - JOUR

T1 - Sensitive radio-frequency read-out of quantum dots using an ultra-low-noise SQUID amplifier

AU - Schupp, F J

AU - Vigneau, F.

AU - Wen, Yutian

AU - Mavalankar, A

AU - Griffiths, J. P.

AU - Jones, G. A. C.

AU - Farrer, I.

AU - Ritchie, David

AU - Smith, C. G.

AU - Camenzind, L. C.

AU - Yu, L.

AU - Zumbühl, Dominik

AU - Briggs, G. Andrew D.

AU - Laird, Edward

N1 - Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 2020 and may be found at https://doi.org/10.1063/5.0005886 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

PY - 2020/6/29

Y1 - 2020/6/29

N2 - Fault-tolerant spin-based quantum computers will require fast and accurate qubit readout. This can be achieved using radio-frequency reflectometry given sufficient sensitivity to the change in quantum capacitance associated with the qubit states. Here, we demonstrate a 23-fold improvement in capacitance sensitivity by supplementing a cryogenic semiconductor amplifier with a SQUID preamplifier. The SQUID amplifier operates at a frequency near 200 MHz and achieves a noise temperature below 600 mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of 0.07 aF/ \sqrt{Hz}. The setup is used to acquire charge stability diagrams of a gate-defined double quantum dot in a short time with a signal-to-noise ration of about 38 in 1 μs of integration time.

AB - Fault-tolerant spin-based quantum computers will require fast and accurate qubit readout. This can be achieved using radio-frequency reflectometry given sufficient sensitivity to the change in quantum capacitance associated with the qubit states. Here, we demonstrate a 23-fold improvement in capacitance sensitivity by supplementing a cryogenic semiconductor amplifier with a SQUID preamplifier. The SQUID amplifier operates at a frequency near 200 MHz and achieves a noise temperature below 600 mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of 0.07 aF/ \sqrt{Hz}. The setup is used to acquire charge stability diagrams of a gate-defined double quantum dot in a short time with a signal-to-noise ration of about 38 in 1 μs of integration time.

U2 - 10.1063/5.0005886

DO - 10.1063/5.0005886

M3 - Journal article

VL - 127

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

M1 - 244503

ER -