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    Rights statement: Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 24 2020 and may be found at http://dx.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 radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier. / Schupp, F.J.; Vigneau, F.; Wen, Y. et al.
In: Journal of Applied Physics, Vol. 127, No. 24, 0005886, 28.06.2020.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Schupp, FJ, Vigneau, F, Wen, Y, Mavalankar, A, Griffiths, J, Jones, GAC, Farrer, I, Ritchie, DA, Smith, CG, Camenzind, LC, Yu, L, Zumbühl, DM, Briggs, GAD, Ares, N & Laird, EA 2020, 'Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier', Journal of Applied Physics, vol. 127, no. 24, 0005886. https://doi.org/10.1063/5.0005886

APA

Schupp, F. J., Vigneau, F., Wen, Y., Mavalankar, A., Griffiths, J., Jones, G. A. C., Farrer, I., Ritchie, D. A., Smith, C. G., Camenzind, L. C., Yu, L., Zumbühl, D. M., Briggs, G. A. D., Ares, N., & Laird, E. A. (2020). Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier. Journal of Applied Physics, 127(24), Article 0005886. https://doi.org/10.1063/5.0005886

Vancouver

Schupp FJ, Vigneau F, Wen Y, Mavalankar A, Griffiths J, Jones GAC et al. Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier. Journal of Applied Physics. 2020 Jun 28;127(24):0005886. doi: 10.1063/5.0005886

Author

Schupp, F.J. ; Vigneau, F. ; Wen, Y. et al. / Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier. In: Journal of Applied Physics. 2020 ; Vol. 127, No. 24.

Bibtex

@article{6812c2727376468d9a3b49d0578e458b,
title = "Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier",
abstract = "Fault-tolerant spin-based quantum computers will require fast and accurate qubit read out. This can be achieved using radiofrequency 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 200MHz and achieves a noise temperature below 600mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of0.07 mml:mspace width={"}.1em{"}mml:mspaceaF / mml:msqrtHzmml:msqrt. 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 in1 mml:mspace width={"}.1em{"}mml:mspace mus of integration time.",
keywords = "Capacitance, Molluscs, Nanocrystals, Qubits, Reflection, Reflectometers, Semiconductor quantum dots, Signal to noise ratio, Charge stability, Cryogenic Semiconductors, Double quantum dots, Integration time, Noise temperature, Quantum capacitance, Radio frequencies, Signal to noise rations, SQUIDs",
author = "F.J. Schupp and F. Vigneau and Y. Wen and A. Mavalankar and J. Griffiths and G.A.C. Jones and I. Farrer and D.A. Ritchie and C.G. Smith and L.C. Camenzind and L. Yu and D.M. Zumb{\"u}hl and G.A.D. Briggs and N. Ares and E.A. Laird",
note = "Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 24 2020 and may be found at http://dx.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 = "28",
doi = "10.1063/5.0005886",
language = "English",
volume = "127",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "AMER INST PHYSICS",
number = "24",

}

RIS

TY - JOUR

T1 - Sensitive radiofrequency readout of quantum dots using an ultra-low-noise SQUID amplifier

AU - Schupp, F.J.

AU - Vigneau, F.

AU - Wen, Y.

AU - Mavalankar, A.

AU - Griffiths, J.

AU - Jones, G.A.C.

AU - Farrer, I.

AU - Ritchie, D.A.

AU - Smith, C.G.

AU - Camenzind, L.C.

AU - Yu, L.

AU - Zumbühl, D.M.

AU - Briggs, G.A.D.

AU - Ares, N.

AU - Laird, E.A.

N1 - Copyright 2020 American Institute of Physics. The following article appeared in Journal of Applied Physics, 127, 24 2020 and may be found at http://dx.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 - 2020/6/28

Y1 - 2020/6/28

N2 - Fault-tolerant spin-based quantum computers will require fast and accurate qubit read out. This can be achieved using radiofrequency 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 200MHz and achieves a noise temperature below 600mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of0.07 mml:mspace width=".1em"mml:mspaceaF / mml:msqrtHzmml:msqrt. 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 in1 mml:mspace width=".1em"mml:mspace mus of integration time.

AB - Fault-tolerant spin-based quantum computers will require fast and accurate qubit read out. This can be achieved using radiofrequency 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 200MHz and achieves a noise temperature below 600mK when integrated into a reflectometry circuit, which is within a factor 120 of the quantum limit. It enables a record sensitivity to capacitance of0.07 mml:mspace width=".1em"mml:mspaceaF / mml:msqrtHzmml:msqrt. 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 in1 mml:mspace width=".1em"mml:mspace mus of integration time.

KW - Capacitance

KW - Molluscs

KW - Nanocrystals

KW - Qubits

KW - Reflection

KW - Reflectometers

KW - Semiconductor quantum dots

KW - Signal to noise ratio

KW - Charge stability

KW - Cryogenic Semiconductors

KW - Double quantum dots

KW - Integration time

KW - Noise temperature

KW - Quantum capacitance

KW - Radio frequencies

KW - Signal to noise rations

KW - SQUIDs

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

IS - 24

M1 - 0005886

ER -