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Analysis of high quality superconducting resonators: consequences for TLS properties in amorphous oxides
Jonathan Burnett, Lara Faoro, Tobias Lindstrom
noise caused by microscopic Two-Level Systems (TLS) is known to be very detrimental to the performance of superconducting quantum devices but the nature of these TLS is still…
Generalized Tunneling Model for TLS in amorphous materials and its predictions for their dephasing and the noise in superconducting microresonators
Lara Faoro, Lev B. Ioffe
We formulate the generalized tunneling model for two level systems in insulators that takes into account the interaction between them and a slow power law dependence of their densi…
Evidence for interacting two-level systems from the 1/f noise of a superconducting resonator
J. Burnett, L. Faoro, I. Wisby +9
Here we find the increase in 1/f noise of superconducting resonators at low temperatures to be completely incompatible with the standard tunneling model (STM) of Two Level Systems…
Internal loss of superconducting resonators induced by interacting two level systems
Lara Faoro, Lev B. Ioffe
In a number of recent experiments with microwave high quality superconducting coplanar waveguide (CPW) resonators an anomalously weak power dependence of the quality factor has bee…
Fractal spin structures as origin of 1/f magnetic noise in superconducting circuits
K. Kechedzhi, L. Faoro, L. B. Ioffe
We analyze recent data on the complex inductance of dc SQUIDs that show 1/f inductance noise highly correlated with conventional 1/f flux noise. We argue that these data imply a fo…
Damping in high-frequency metallic nanomechanical resonators
F. Hoehne, Yu. A. Pashkin, O. Astafiev +4
We have studied damping in polycrystalline Al nanomechanical resonators by measuring the temperature dependence of their resonance frequency and quality factor over a temperature r…