Suppression of low-frequency charge noise in superconducting resonators by surface spin desorption
Journal article, 2018
Noise and decoherence due to spurious two-level systems located at material interfaces are long-standing issues for solid-state quantum devices. Efforts to mitigate the effects of two-level systems have been hampered by a lack of knowledge about their chemical and physical nature. Here, by combining dielectric loss, frequency noise and on-chip electron spin resonance measurements in superconducting resonators, we demonstrate that desorption of surface spins is accompanied by an almost tenfold reduction in the charge-induced frequency noise in the resonators. These measurements provide experimental evid ence that simultaneously reveals the chemical signatures of adsorbed magnetic moments and highlights their role in generating charge noise in solid-state quantum devices.
Author
Sebastian Erik de Graaf
National Physical Laboratory (NPL)
L. Faoro
Landau Institute for Theoretical Physics
Pierre and Marie Curie University (UPMC)
Jonathan Burnett
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Astghik Adamyan
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Alexander Tzalenchuk
National Physical Laboratory (NPL)
Royal Holloway University of London
Sergey Kubatkin
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Tobias Lindström
National Physical Laboratory (NPL)
Andrey Danilov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 9 1 1143Subject Categories
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1038/s41467-018-03577-2
PubMed
29559633