Reduced frequency noise in superconducting resonators

2010/05/28 by R. Barends, N. Vercruyssen, A. Endo +4 · 4 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Physics of Superconductivity and Magnetism #Superconducting and THz Device Technology #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1063/1.3467052

published as Appl. Phys. Lett. 97, 033507 (2010) · 4 pages, 4 figures

arxiv created 2010/05/28 · openalex publication_date 2010/07/19 · arxiv updated 2010/07/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report a reduction in the frequency noise in coplanar waveguide superconducting resonators. The reduction of 7 dB is achieved by removing the exposed dielectric substrate surface from the region with high electric fields and by using NbTiN. In a model-analysis the surface of NbTiN is found to be a negligible source of noise, experimentally supported by a comparison with NbTiN on SiOx resonators. The reduction is additive to decreasing the noise by widening the resonators.

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