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Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching. / Ares, N; Schupp, F J; Mavalankar, A et al.
In: Physical Review Applied, Vol. 5, 034011, 24.03.2016.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Ares, N, Schupp, FJ, Mavalankar, A, Rogers, G, Griffiths, JP, Jones, GAC, Farrer, I, Ritchie, DA, Smith, CG, Cottet, A, Briggs, GAD & Laird, EA 2016, 'Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching', Physical Review Applied, vol. 5, 034011. https://doi.org/10.1103/PhysRevApplied.5.034011

APA

Ares, N., Schupp, F. J., Mavalankar, A., Rogers, G., Griffiths, J. P., Jones, G. A. C., Farrer, I., Ritchie, D. A., Smith, C. G., Cottet, A., Briggs, G. A. D., & Laird, E. A. (2016). Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching. Physical Review Applied, 5, Article 034011. https://doi.org/10.1103/PhysRevApplied.5.034011

Vancouver

Ares N, Schupp FJ, Mavalankar A, Rogers G, Griffiths JP, Jones GAC et al. Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching. Physical Review Applied. 2016 Mar 24;5:034011. doi: 10.1103/PhysRevApplied.5.034011

Author

Ares, N ; Schupp, F J ; Mavalankar, A et al. / Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching. In: Physical Review Applied. 2016 ; Vol. 5.

Bibtex

@article{49fda446847d479fa468ed871c4d6966,
title = "Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching",
abstract = "Electrical readout of spin qubits requires fast and sensitive measurements, which are hindered by poor impedance matching to the device. We demonstrate perfect impedance matching in a radio-frequency readout circuit, using voltage-tunable varactors to cancel out parasitic capacitances. An optimized capacitance sensitivity of 1.6  aF/√Hz is achieved at a maximum source-drain bias of 170−μV root-mean-square and with a bandwidth of 18 MHz. Coulomb blockade in a quantum-dot is measured in both conductance and capacitance, and the two contributions are found to be proportional as expected from a quasistatic tunneling model. We benchmark our results against the requirements for single-shot qubit readout using quantum capacitance, a goal that has so far been elusive.",
author = "N Ares and Schupp, {F J} and A Mavalankar and G Rogers and Griffiths, {J P} and Jones, {G A C} and I Farrer and Ritchie, {D. A.} and Smith, {C G} and A Cottet and Briggs, {G A D} and Laird, {E A}",
year = "2016",
month = mar,
day = "24",
doi = "10.1103/PhysRevApplied.5.034011",
language = "English",
volume = "5",
journal = "Physical Review Applied",
issn = "2331-7019",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Sensitive Radio-Frequency Measurements of a Quantum Dot by Tuning to Perfect Impedance Matching

AU - Ares, N

AU - Schupp, F J

AU - Mavalankar, A

AU - Rogers, G

AU - Griffiths, J P

AU - Jones, G A C

AU - Farrer, I

AU - Ritchie, D. A.

AU - Smith, C G

AU - Cottet, A

AU - Briggs, G A D

AU - Laird, E A

PY - 2016/3/24

Y1 - 2016/3/24

N2 - Electrical readout of spin qubits requires fast and sensitive measurements, which are hindered by poor impedance matching to the device. We demonstrate perfect impedance matching in a radio-frequency readout circuit, using voltage-tunable varactors to cancel out parasitic capacitances. An optimized capacitance sensitivity of 1.6  aF/√Hz is achieved at a maximum source-drain bias of 170−μV root-mean-square and with a bandwidth of 18 MHz. Coulomb blockade in a quantum-dot is measured in both conductance and capacitance, and the two contributions are found to be proportional as expected from a quasistatic tunneling model. We benchmark our results against the requirements for single-shot qubit readout using quantum capacitance, a goal that has so far been elusive.

AB - Electrical readout of spin qubits requires fast and sensitive measurements, which are hindered by poor impedance matching to the device. We demonstrate perfect impedance matching in a radio-frequency readout circuit, using voltage-tunable varactors to cancel out parasitic capacitances. An optimized capacitance sensitivity of 1.6  aF/√Hz is achieved at a maximum source-drain bias of 170−μV root-mean-square and with a bandwidth of 18 MHz. Coulomb blockade in a quantum-dot is measured in both conductance and capacitance, and the two contributions are found to be proportional as expected from a quasistatic tunneling model. We benchmark our results against the requirements for single-shot qubit readout using quantum capacitance, a goal that has so far been elusive.

U2 - 10.1103/PhysRevApplied.5.034011

DO - 10.1103/PhysRevApplied.5.034011

M3 - Journal article

VL - 5

JO - Physical Review Applied

JF - Physical Review Applied

SN - 2331-7019

M1 - 034011

ER -