2015/12/08 by Jonathan Burnett, J Burnett, Lara Faoro +3 · 1 citation
Physics and Astronomy · #Amorphous solid #Dipole #Mechanical and Optical Resonators #Noise (video) #Physics of Superconductivity and Magnetism #Quality (philosophy) #Quantum and electron transport phenomena #Resonator #Superconductivity #cond-mat.mes-hall
paper · pdf · doi:10.1088/0953-2048/29/4/044008
8 pages, 5 figures
arxiv created 2015/12/08 · openalex publication_date 2016/03/11 · arxiv updated 2016/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 poorly understood. Recent experiments with superconducting resonators indicates that interaction between TLS in the oxide at the film-substrate interface is not negligible. Here we present data on the loss and frequency noise from two different Nb resonators with and without Pt capping and discuss what conclusions can be drawn regarding the properties of TLS in amorphous oxides. We also estimate the concentration and dipole moment of the TLS.