qtsa: Quantum Time Series Analysis: Drift, Noise Spectroscopy and
Calibration Forecasting
Tools for exploratory statistical analysis of quantum-hardware
calibration time series. The package provides simulators for random
telegraph noise (RTN), power-law noise, and Ornstein-Uhlenbeck dephasing;
Welch and sine-multitaper power spectral density estimators; a lightweight
two-state hidden Markov model for switching signals; cumulative sum
(CUSUM) and binary-segmentation diagnostics for calibration drift;
residual-quantile interval forecasts; and filter-function calculations for
illustrative coherence curves. The package includes a reproducible
generator of simulated superconducting-qubit calibration records; it does
not retrieve authenticated live provider data. Methodological background
is provided by Welch (1967) <doi:10.1109/TAU.1967.1161901>, Thomson (1982)
<doi:10.1109/PROC.1982.12433>, Rabiner (1989) <doi:10.1109/5.18626>, Page
(1954) <doi:10.1093/biomet/41.1-2.100>, Paladino et al. (2014)
<doi:10.1103/RevModPhys.86.361>, and Cywinski et al. (2008)
<doi:10.1103/PhysRevB.77.174509>.
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