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Cited by 587

The DOI matches its Crossref record; 66 of the 66 references it cites were found in a registry or an index.

The flux qubit revisited to enhance coherence and reproducibility

Open access
Yan, Fei, Gustavsson, Simon, Kamal, Archana, Birenbaum, Jeffrey, Sears, Adam P, Hover, David, Gudmundsen, Ted J., Rosenberg, Danna, Samach, Gabriel, Weber, S, Yoder, Jonilyn L., Orlando, Terry P., Clarke, John, Kerman, Andrew J., Oliver, William D.·2016·Nature Communications
DOI 10.1038/ncomms12964
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Abstract

The scalable application of quantum information science will stand on reproducible and controllable high-coherence quantum bits (qubits). Here, we revisit the design and fabrication of the superconducting flux qubit, achieving a planar device with broad-frequency tunability, strong anharmonicity, high reproducibility and relaxation times in excess of 40 μs at its flux-insensitive point. Qubit relaxation times T1 across 22 qubits are consistently matched with a single model involving resonator loss, ohmic charge noise and 1/f-flux noise, a noise source previously considered primarily in the context of dephasing. We furthermore demonstrate that qubit dephasing at the flux-insensitive point is dominated by residual thermal-photons in the readout resonator. The resulting photon shot noise is mitigated using a dynamical decoupling protocol, resulting in T2≈85 μs, approximately the 2 T1 limit. In addition to realizing an improved flux qubit, our results uniquely identify photon shot noise as limiting T2 in contemporary qubits based on transverse qubit–resonator interaction.

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Metadata

Authors
Yan, F., Gustavsson, S., Kamal, A., Birenbaum, J., Sears, A. P., Hover, D., Gudmundsen, T. J., Rosenberg, D., Samach, G., Weber, S., Yoder, J. L., Orlando, T. P., Clarke, J., Kerman, A. J., & Oliver, W. D.
Venue
Nature Communications
Publisher
Springer Science and Business Media LLC
Published
2016-11-03
Volume
7
Issue
1
Pages
12964-12964
ISSN
2041-1723 (ISSN-L)
DOI
10.1038/ncomms12964
OpenAlex
W2463723514
Cited by
587
References
66
FWCI
39.56
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: The flux qubit revisited to enhance coherence and reproducibility. https://app.cochat.ai/papers/10.1038/ncomms12964
The paper
Yan, F., Gustavsson, S., Kamal, A., Birenbaum, J., Sears, A. P., Hover, D., Gudmundsen, T. J., Rosenberg, D., Samach, G., Weber, S., Yoder, J. L., Orlando, T. P., Clarke, J., Kerman, A. J., & Oliver, W. D. (2016). The flux qubit revisited to enhance coherence and reproducibility. Nature Communications. https://doi.org/10.1038/ncomms12964

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.