Reduced frequency noise in superconducting resonators
classification
❄️ cond-mat.mes-hall
cond-mat.supr-con
keywords
noiseresonatorsnbtinreductionfrequencysuperconductingsurfaceachieved
read the original abstract
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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