Reduced frequency noise in superconducting resonators

Details Reduced frequency noise in superconducting resonators Reduced frequency noise in superconducting resonators

2010-05-28

arxiv.org/abs/1005.5394v1

Appl. Phys. Lett. 97, 033507 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1063/1.3467052

We report a reduction of 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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