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Observation of classical-quantum crossover of 1/f flux noise and its paramagnetic temperature dependence
C. M. Quintana, Yu Chen, D. Sank +25
By analyzing the dissipative dynamics of a tunable gap flux qubit, we extract both sides of its two-sided environmental flux noise spectral density over a range of frequencies arou…
Dielectric surface loss in superconducting resonators with flux-trapping holes
B. Chiaro, A. Megrant, A. Dunsworth +18
Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes ar…
Scalable in-situ qubit calibration during repetitive error detection
J. Kelly, R. Barends, A. G. Fowler +19
We present a method to optimize qubit control parameters during error detection which is compatible with large-scale qubit arrays. We demonstrate our method to optimize single or t…
Ergodic dynamics and thermalization in an isolated quantum system
C. Neill, P. Roushan, M. Fang +19
Statistical mechanics is founded on the assumption that all accessible configurations of a system are equally likely. This requires dynamics that explore all states over time, know…