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

Universite Pierre et Marie Curie (UPMC)

Jonathan Burnett

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Astghik Adamyan

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Alexander Tzalenchuk

National Physical Laboratory (NPL)

Royal Holloway University of London

Sergey Kubatkin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Tobias Lindström

National Physical Laboratory (NPL)

Andrey Danilov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Nature Communications

2041-1723 (ISSN)

Vol. 9 1143

Ämneskategorier

Annan fysik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1038/s41467-018-03577-2

PubMed

29559633