Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3467052
Keywords
coplanar waveguides; niobium compounds; noise; superconducting resonators; titanium compounds
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Funding
- Royal Holland Society of Sciences and Humanities
- EU
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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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3467052]
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