Suppression of low-frequency charge noise in superconducting resonators by surface spin desorption
Artikel i vetenskaplig tidskrift, 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.
Författare
Sebastian Erik de Graaf
National Physical Laboratory (NPL)
L. Faoro
Landau Institute for Theoretical Physics
Université Pierre et Marie Curie (UPMC)
Jonathan Burnett
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Astghik Adamyan
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Alexander Tzalenchuk
National Physical Laboratory (NPL)
Royal Holloway University of London
Sergey Kubatkin
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Tobias Lindström
National Physical Laboratory (NPL)
Andrey Danilov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 9 1 1143Ämneskategorier
Annan fysik
Annan elektroteknik och elektronik
Den kondenserade materiens fysik
DOI
10.1038/s41467-018-03577-2
PubMed
29559633