Lesson 169: Two-qubit basis and CNOT scaffolding
Focus
Treat placeholders as mandatory—rename qubit lines and budget shots immediately. Token Two-qubit basis and CNOT scaffolding:169 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Two-qubit basis and CNOT scaffolding · drill v9 · spin
324784. - 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
Calibration freshness matrix
| Window | Drift sentinel | Owner |
|--------|----------------|-------|
| TB0-4h | SPAM delta < 0.035 | cal-oncall-0 |
| TB1-28h | randomized benchmarking shift | ops-2 |
Drill: cite which sentinel invalidates queued jobs for lesson L169.
Practice
Practice List five failure signatures unique to your organiser’s QPUs or simulators. — 169 Bump literals mindset by 12.