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arXiv · 1005.5394

Reduced frequency noise in superconducting resonators

R. Barends·N. Vercruyssen·A. Endo·P. J. de Visser·T. Zijlstra·T. M. Klapwijk·J. J. A. Baselmans
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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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R. Barends, N. Vercruyssen, A. Endo, P. J. de Visser, T. Zijlstra, T. M. Klapwijk, J. J. A. Baselmans. 2010-05-28. Reduced frequency noise in superconducting resonators. https://doi.org/10.1063/1.3467052

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