Time-Aligned Coherence Collapse and Readout Error Bursts in Superconducting Qubit Calibration Data.
Year: 2026
Type: preprint
Abstract: Superconducting qubit performance is commonly assessed using snapshot calibration metrics such as coherence time (T2) and readout error probability. While useful for short-term characterization, such static representations obscure temporal structure present in long-term device operation. This technical note presents a time-resolved empirical analysis of publicly available calibration data from the IBM Quantum Athens superconducting quantum processor. By treating calibration records as a chronologically ordered time series, the analysis reveals recurring temporal alignment between abrupt coherence collapses and short-lived bursts of elevated readout error. The analysis is descriptive and model-agnostic by design. No microscopic noise sources, control mechanisms, or causal relationships are inferred. The observations are restricted to pre–error-correction behavior and are intended to document non-stationary, structured behavior that is obscured when calibration data are interpreted solely as static snapshots. These observations are relevant for scheduling, benchmarking, and any methodology that assumes stationary calibration parameters.
Author: Aben, Jos
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7127330130
Cites:
Cited by:
Related to: