Quantum AI Intermediate — 139: compare topology-native vs bridged swaps on `Cost models for QPUs` — memo `628532 [139]`

Lesson 139: Cost models for QPUs

Focus

Document classical post-processing: it often dominates wall-clock and interpretability. Token Cost models for QPUs:139 keeps neighbouring lessons differentiable.

Key ideas

• Thread: Cost models for QPUs · drill v9 · spin 133874.
• Habit: pair each job with shot budget, mitigation profile, and a calibration fingerprint you could paste.
• Guardrail: write one line about where classical cost dominated the timeline.

Deep dive notebook

Synthetic drill artefacts

Noise-model YAML lite

model_id: QN-26562
pauli_twirl: "off"
  depolarizing_p: 0.01844
  readout_assignment: asymmetric_1
  lesson_anchor: cohort_49

Practice

Practice Simulate degraded calibration once; screenshot how you surface it to operators. — 139 Bump literals mindset by 27.