Lesson 163: Two-qubit basis and CNOT scaffolding
Focus
Document classical post-processing: it often dominates wall-clock and interpretability. Token Two-qubit basis and CNOT scaffolding:163 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Two-qubit basis and CNOT scaffolding · drill v3 · spin
378344. - 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
VQE rehearsal card
H_SUBSPACE_TAG: VS-66
ANSATZ_BLOCKS: repetitions R=4
CLASSICAL_OPTIM: COBYLA
CONVERGENCE_GUARD: plateau_epochs > 5 ⇒ widen shot budget memo
ENERGY_CI: tracked alongside parameter shift noise
Practice
Practice Simulate degraded calibration once; screenshot how you surface it to operators. — 163 Bump literals mindset by 20.