Noise and loss from the dielectric environment of planar superconducting circuits
ORAL
Abstract
Understanding of loss mechanisms in superconducting resonators has helped to produce long-lived superconducting qubits. Most notably, for identical fabrication processes, the single-photon quality factor has become a reliable indicator for qubit relaxation time. While this understanding of loss has seen typical T1 approach ≈100μs, the dephasing times often remain far below the relaxation limit. Superconducting resonators can provide information on the time-varying properties of these decoherence mechanisms. We show measurements on a variety of superconducting resonators and qubits, showing that our mean qubit T1 (75μs) is consistent with our mean resonator single photon Qi (106). We then study the temporal properties of the resonator in the framework of interacting two-level systems and apply this understanding to fluctuations in qubit parameters.
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Presenters
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Jonathan Burnett
- MC2, Chalmers University of Technology