Cargando…
Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects
Frequency instability of superconducting resonators and qubits leads to dephasing and time-varying energy loss and hinders quantum processor tune-up. Its main source is dielectric noise originating in surface oxides. Thorough noise studies are needed to develop a comprehensive understanding and miti...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8462906/ https://www.ncbi.nlm.nih.gov/pubmed/34559556 http://dx.doi.org/10.1126/sciadv.abh0462 |
_version_ | 1784572298641014784 |
---|---|
author | Niepce, David Burnett, Jonathan J. Kudra, Marina Cole, Jared H. Bylander, Jonas |
author_facet | Niepce, David Burnett, Jonathan J. Kudra, Marina Cole, Jared H. Bylander, Jonas |
author_sort | Niepce, David |
collection | PubMed |
description | Frequency instability of superconducting resonators and qubits leads to dephasing and time-varying energy loss and hinders quantum processor tune-up. Its main source is dielectric noise originating in surface oxides. Thorough noise studies are needed to develop a comprehensive understanding and mitigation strategy of these fluctuations. We use a frequency-locked loop to track the resonant frequency jitter of three different resonator types—one niobium nitride superinductor, one aluminum coplanar waveguide, and one aluminum cavity—and we observe notably similar random telegraph signal fluctuations. At low microwave drive power, the resonators exhibit multiple, unstable frequency positions, which, for increasing power, coalesce into one frequency due to motional narrowing caused by sympathetic driving of two-level system defects by the resonator. In all three devices, we identify a dominant fluctuator whose switching amplitude (separation between states) saturates with increasing drive power, but whose characteristic switching rate follows the power law dependence of quasi-classical Landau-Zener transitions. |
format | Online Article Text |
id | pubmed-8462906 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-84629062021-10-01 Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects Niepce, David Burnett, Jonathan J. Kudra, Marina Cole, Jared H. Bylander, Jonas Sci Adv Physical and Materials Sciences Frequency instability of superconducting resonators and qubits leads to dephasing and time-varying energy loss and hinders quantum processor tune-up. Its main source is dielectric noise originating in surface oxides. Thorough noise studies are needed to develop a comprehensive understanding and mitigation strategy of these fluctuations. We use a frequency-locked loop to track the resonant frequency jitter of three different resonator types—one niobium nitride superinductor, one aluminum coplanar waveguide, and one aluminum cavity—and we observe notably similar random telegraph signal fluctuations. At low microwave drive power, the resonators exhibit multiple, unstable frequency positions, which, for increasing power, coalesce into one frequency due to motional narrowing caused by sympathetic driving of two-level system defects by the resonator. In all three devices, we identify a dominant fluctuator whose switching amplitude (separation between states) saturates with increasing drive power, but whose characteristic switching rate follows the power law dependence of quasi-classical Landau-Zener transitions. American Association for the Advancement of Science 2021-09-24 /pmc/articles/PMC8462906/ /pubmed/34559556 http://dx.doi.org/10.1126/sciadv.abh0462 Text en Copyright © 2021 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). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Physical and Materials Sciences Niepce, David Burnett, Jonathan J. Kudra, Marina Cole, Jared H. Bylander, Jonas Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title | Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title_full | Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title_fullStr | Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title_full_unstemmed | Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title_short | Stability of superconducting resonators: Motional narrowing and the role of Landau-Zener driving of two-level defects |
title_sort | stability of superconducting resonators: motional narrowing and the role of landau-zener driving of two-level defects |
topic | Physical and Materials Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8462906/ https://www.ncbi.nlm.nih.gov/pubmed/34559556 http://dx.doi.org/10.1126/sciadv.abh0462 |
work_keys_str_mv | AT niepcedavid stabilityofsuperconductingresonatorsmotionalnarrowingandtheroleoflandauzenerdrivingoftwoleveldefects AT burnettjonathanj stabilityofsuperconductingresonatorsmotionalnarrowingandtheroleoflandauzenerdrivingoftwoleveldefects AT kudramarina stabilityofsuperconductingresonatorsmotionalnarrowingandtheroleoflandauzenerdrivingoftwoleveldefects AT colejaredh stabilityofsuperconductingresonatorsmotionalnarrowingandtheroleoflandauzenerdrivingoftwoleveldefects AT bylanderjonas stabilityofsuperconductingresonatorsmotionalnarrowingandtheroleoflandauzenerdrivingoftwoleveldefects |