Internal loss of superconducting resonators induced by interacting two level systems

Details Internal loss of superconducting resonators induced by interacting two level systems Internal loss of superconducting resonators induced by interacting two level systems

2012-01-25

arxiv.org/abs/1201.5299v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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 been observed. We argue that this observation implies that the monochromatic radiation does not saturate the Two Level Systems (TLS) located at the interface oxide surfaces of the resonator and suggests the importance of their interactions. We estimate the microwave loss due to interacting TLS and show that the interactions between TLS lead to a drift of their energies that result in a much slower, logarithmic dependence of their absorption on the radiation power in agreement with the data.

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