Preregistered simulation study: dose-response of a one-shot orbit covariance law's accuracy as the disorder strength falls toward the integrable limit.
Preregistered re-analysis of frozen simulation rows. When the coherence between the two branches of a central-spin record state is progressively ablated, does the record plateau die at a threshold - most configurations losing it at essentially one dose, the survival curve falling in a single step - or does it erode gradually across the dose grid? This study judges that one functional on the frozen rows of an earlier branch-coherence ablation study (132 configurations, five ablation doses): whether plateau deaths are concentrated at a single onset dose. No new simulation.
Preregistered re-analysis of frozen simulation rows. In a central-spin model, information about the central spin is recorded redundantly in its environment, appearing as a plateau in the mutual-information curve between the system and environment fragments; the plateau's height measures the record's strength. On the substrate of configurations whose plateau is intact at the reference dose of an earlier flip-amplitude dose-response study (36 configurations), this study tests whether the substrate-median plateau height builds monotonically with spin-flip coupling strength across six doses. A single deterministic pass; no new simulation.