Science Advances

Supplementary Materials

Two-level systems in superconducting quantum devices due to trapped quasiparticles

S. E. de Graaf, L. Faoro, L. B. Ioffe, S. Mahashabde, J. J. Burnett, T. Lindström, S. E. Kubatkin, A. V. Danilov, A. Ya. Tzalenchuk

Download Supplement

This PDF file includes:

  • Derivation of the qTLS density of states
  • Properties of the superconducting film
  • Measurement setup
  • Loss tangent
  • 1/f frequency noise
  • qTLS density in the presence of an electrostatic field
  • Saturation of individual qTLS
  • Electron spin resonance spectrum
  • Thermal reconfiguration of qTLS
  • Effect of tuning current on qTLS
  • Surface TLS density
  • Figs. S1 to S13
  • References

Files in this Data Supplement: