Anomalous charge noise in superconducting qubits

B. G. Christensen, C. D. Wilen, A. Opremcak, J. Nelson, F. Schlenker, C. H. Zimonick, L. Faoro, L. B. Ioffe, Y. J. Rosen, J. L. Dubois, B. L.T. Plourde, R. Mcdermott

Research output: Contribution to journalArticle

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Abstract

We have used Ramsey tomography to characterize charge noise in a weakly charge-sensitive superconducting qubit. We find a charge noise that scales with frequency as 1/fα over five decades with α=1.93 and a magnitude Sq(1Hz)=2.9×10-4e2/Hz. The noise exponent and magnitude of the low-frequency noise are much larger than those seen in prior work on single electron transistors, yet are consistent with reports of frequency noise in other superconducting qubits. Moreover, we observe frequent large-amplitude jumps in offset charge exceeding 0.1e; these large discrete charge jumps are incompatible with a picture of localized dipolelike two-level fluctuators. The data reveal an unexpected dependence of charge noise on device scale and suggest models involving either charge drift or fluctuating patch potentials.

Original languageEnglish (US)
Article number140503
JournalPhysical Review B
Volume100
Issue number14
DOIs
StatePublished - Oct 24 2019

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Single electron transistors
Tomography
single electron transistors
scale models
tomography
exponents
low frequencies

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Christensen, B. G., Wilen, C. D., Opremcak, A., Nelson, J., Schlenker, F., Zimonick, C. H., ... Mcdermott, R. (2019). Anomalous charge noise in superconducting qubits. Physical Review B, 100(14), [140503]. https://doi.org/10.1103/PhysRevB.100.140503

Anomalous charge noise in superconducting qubits. / Christensen, B. G.; Wilen, C. D.; Opremcak, A.; Nelson, J.; Schlenker, F.; Zimonick, C. H.; Faoro, L.; Ioffe, L. B.; Rosen, Y. J.; Dubois, J. L.; Plourde, B. L.T.; Mcdermott, R.

In: Physical Review B, Vol. 100, No. 14, 140503, 24.10.2019.

Research output: Contribution to journalArticle

Christensen, BG, Wilen, CD, Opremcak, A, Nelson, J, Schlenker, F, Zimonick, CH, Faoro, L, Ioffe, LB, Rosen, YJ, Dubois, JL, Plourde, BLT & Mcdermott, R 2019, 'Anomalous charge noise in superconducting qubits', Physical Review B, vol. 100, no. 14, 140503. https://doi.org/10.1103/PhysRevB.100.140503
Christensen BG, Wilen CD, Opremcak A, Nelson J, Schlenker F, Zimonick CH et al. Anomalous charge noise in superconducting qubits. Physical Review B. 2019 Oct 24;100(14). 140503. https://doi.org/10.1103/PhysRevB.100.140503
Christensen, B. G. ; Wilen, C. D. ; Opremcak, A. ; Nelson, J. ; Schlenker, F. ; Zimonick, C. H. ; Faoro, L. ; Ioffe, L. B. ; Rosen, Y. J. ; Dubois, J. L. ; Plourde, B. L.T. ; Mcdermott, R. / Anomalous charge noise in superconducting qubits. In: Physical Review B. 2019 ; Vol. 100, No. 14.
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