Two-level systems in superconducting quantum devices due to trapped quasiparticles. / de Graaf, S E; Faoro, L; Ioffe, L B; Mahashabde, S; Burnett, J J; Lindström, T; Kubatkin, S E; Danilov, A V; Tzalenchuk, A Ya.

In: Science Advances, Vol. 6, No. 51, eabc5055, 18.12.2020, p. 1-8.

Research output: Contribution to journalArticlepeer-review

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Two-level systems in superconducting quantum devices due to trapped quasiparticles. / de Graaf, S E; Faoro, L; Ioffe, L B; Mahashabde, S; Burnett, J J; Lindström, T; Kubatkin, S E; Danilov, A V; Tzalenchuk, A Ya.

In: Science Advances, Vol. 6, No. 51, eabc5055, 18.12.2020, p. 1-8.

Research output: Contribution to journalArticlepeer-review

Harvard

de Graaf, SE, Faoro, L, Ioffe, LB, Mahashabde, S, Burnett, JJ, Lindström, T, Kubatkin, SE, Danilov, AV & Tzalenchuk, AY 2020, 'Two-level systems in superconducting quantum devices due to trapped quasiparticles', Science Advances, vol. 6, no. 51, eabc5055, pp. 1-8. https://doi.org/10.1126/sciadv.abc5055

APA

de Graaf, S. E., Faoro, L., Ioffe, L. B., Mahashabde, S., Burnett, J. J., Lindström, T., Kubatkin, S. E., Danilov, A. V., & Tzalenchuk, A. Y. (2020). Two-level systems in superconducting quantum devices due to trapped quasiparticles. Science Advances, 6(51), 1-8. [eabc5055]. https://doi.org/10.1126/sciadv.abc5055

Vancouver

de Graaf SE, Faoro L, Ioffe LB, Mahashabde S, Burnett JJ, Lindström T et al. Two-level systems in superconducting quantum devices due to trapped quasiparticles. Science Advances. 2020 Dec 18;6(51):1-8. eabc5055. https://doi.org/10.1126/sciadv.abc5055

Author

de Graaf, S E ; Faoro, L ; Ioffe, L B ; Mahashabde, S ; Burnett, J J ; Lindström, T ; Kubatkin, S E ; Danilov, A V ; Tzalenchuk, A Ya. / Two-level systems in superconducting quantum devices due to trapped quasiparticles. In: Science Advances. 2020 ; Vol. 6, No. 51. pp. 1-8.

BibTeX

@article{e84384541552446e916567dbf687ee02,
title = "Two-level systems in superconducting quantum devices due to trapped quasiparticles",
abstract = "A major issue for the implementation of large-scale superconducting quantum circuits is the interaction with interfacial two-level system (TLS) defects that lead to qubit parameter fluctuations and relaxation. Another major challenge comes from nonequilibrium quasiparticles (QPs) that result in qubit relaxation and dephasing. Here, we reveal a previously unexplored decoherence mechanism in the form of a new type of TLS originating from trapped QPs, which can induce qubit relaxation. Using spectral, temporal, thermal, and magnetic field mapping of TLS-induced fluctuations in frequency tunable resonators, we identify a highly coherent subset of the general TLS population with a low reconfiguration temperature ∼300 mK and a nonuniform density of states. These properties can be understood if the TLS are formed by QPs trapped in shallow subgap states formed by spatial fluctutations of the superconducting order parameter. This implies that even very rare QP bursts will affect coherence over exponentially long time scales.",
author = "{de Graaf}, {S E} and L Faoro and Ioffe, {L B} and S Mahashabde and Burnett, {J J} and T Lindstr{\"o}m and Kubatkin, {S E} and Danilov, {A V} and Tzalenchuk, {A Ya}",
note = "Copyright {\textcopyright} 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).",
year = "2020",
month = dec,
day = "18",
doi = "10.1126/sciadv.abc5055",
language = "English",
volume = "6",
pages = "1--8",
journal = "Science Advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "51",

}

RIS

TY - JOUR

T1 - Two-level systems in superconducting quantum devices due to trapped quasiparticles

AU - de Graaf, S E

AU - Faoro, L

AU - Ioffe, L B

AU - Mahashabde, S

AU - Burnett, J J

AU - Lindström, T

AU - Kubatkin, S E

AU - Danilov, A V

AU - Tzalenchuk, A Ya

N1 - Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

PY - 2020/12/18

Y1 - 2020/12/18

N2 - A major issue for the implementation of large-scale superconducting quantum circuits is the interaction with interfacial two-level system (TLS) defects that lead to qubit parameter fluctuations and relaxation. Another major challenge comes from nonequilibrium quasiparticles (QPs) that result in qubit relaxation and dephasing. Here, we reveal a previously unexplored decoherence mechanism in the form of a new type of TLS originating from trapped QPs, which can induce qubit relaxation. Using spectral, temporal, thermal, and magnetic field mapping of TLS-induced fluctuations in frequency tunable resonators, we identify a highly coherent subset of the general TLS population with a low reconfiguration temperature ∼300 mK and a nonuniform density of states. These properties can be understood if the TLS are formed by QPs trapped in shallow subgap states formed by spatial fluctutations of the superconducting order parameter. This implies that even very rare QP bursts will affect coherence over exponentially long time scales.

AB - A major issue for the implementation of large-scale superconducting quantum circuits is the interaction with interfacial two-level system (TLS) defects that lead to qubit parameter fluctuations and relaxation. Another major challenge comes from nonequilibrium quasiparticles (QPs) that result in qubit relaxation and dephasing. Here, we reveal a previously unexplored decoherence mechanism in the form of a new type of TLS originating from trapped QPs, which can induce qubit relaxation. Using spectral, temporal, thermal, and magnetic field mapping of TLS-induced fluctuations in frequency tunable resonators, we identify a highly coherent subset of the general TLS population with a low reconfiguration temperature ∼300 mK and a nonuniform density of states. These properties can be understood if the TLS are formed by QPs trapped in shallow subgap states formed by spatial fluctutations of the superconducting order parameter. This implies that even very rare QP bursts will affect coherence over exponentially long time scales.

U2 - 10.1126/sciadv.abc5055

DO - 10.1126/sciadv.abc5055

M3 - Article

C2 - 33355127

VL - 6

SP - 1

EP - 8

JO - Science Advances

JF - Science Advances

SN - 2375-2548

IS - 51

M1 - eabc5055

ER -