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)

Vol. 9 1 1143

Subject Categories

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

DOI

10.1038/s41467-018-03577-2

PubMed

29559633

More information

Latest update

5/31/2018