Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators

Abstract

We study NbTiN resonators by measurements of the temperature dependent resonance frequency and frequency noise. Additionally, resonators are studied covered with SiOx dielectric layers of various thicknesses. The resonance frequency develops a non-monotonic temperature dependence with increasing SiOx layer thickness. The increase in the noise is independent of the SiOx thickness, demonstrating that the noise is not dominantly related to the low temperature resonance frequency deviations.

4 pages, 3 figures

References in corpus (3)

• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Tunable resonators for quantum circuits
• Temperature Dependence of the Frequency and Noise of Superconducting Coplanar Waveguide Resonators

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