This paper evaluates quantum recovery of minimal cut set (MCS) structure across eight IBM hardware runs spanning four runtime arms (A1–A4) and two backends (ibmₜorino and ibmₘarrakesh), using an independent raw-counts recomputation as the authoritative analysis layer. Each arm combines a resilience level (RL0, RL1, or RL2) with a dynamical decoupling (DD) setting (on or off), applied to CL-QUBO fault tree circuits encoding 8 reactor-scale pilot subtrees from a prior hardware study. Each run submitted 8 primitive unified blocs (pubs), one per subtree, at 8, 192 shots each with bind parameters 0. 2, 0. 2. The canonical analysis spans 64 pubs and 12, 800 top-200 rows with zero unresolved issues. The principal finding is that the IBM hardware runs produced nonzero exact and nonzero superset MCS recovery. Across the study, mean top-200 exact hits were 16. 6 per pub (range 10. 4–22. 6 across runs), mean exact MCS mass was 0. 074, mean exact-or-superset mass was 0. 820, and mean superset-nonexact mass was 0. 746. Recovery is present but is not dominated by exact MCS outcomes: approximately 91% of the recovered exact-or-superset probability mass lies in superset-nonexact structure. ibmₜorino showed descriptively stronger exact recovery (mean exact hits 20. 8 versus 12. 5 for ibmₘarrakesh), while ibmₘarrakesh showed descriptively stronger broad superset-heavy recovery (mean superset hits 146. 4 versus 134. 3 for ibmₜorino). An earlier scorer-layer analysis yielded a zero-recovery interpretation; the independent raw-counts recomputation showed that this was an artifact of a contract mismatch and supersedes the earlier result. This paper does not claim quantum advantage.
Devin Peters (Thu,) studied this question.