Funding
EMP is funded through the Horizon2020 programme of the European Commission.
Selected Publications
 

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

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


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

doi: 10.1063/1.3467052