Lesson 019: Two-qubit basis and CNOT scaffolding
Focus
Assume every diagram must map to topology and basis gates—not textbook abstractions alone. Token Two-qubit basis and CNOT scaffolding:19 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Two-qubit basis and CNOT scaffolding · drill v9 · spin
569040. - 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-19
ANSATZ_BLOCKS: repetitions R=2
CLASSICAL_OPTIM: COBYLA
CONVERGENCE_GUARD: plateau_epochs > 5 ⇒ widen shot budget memo
ENERGY_CI: tracked alongside parameter shift noise
Practice
Practice Paste the circuit scaffold into an experiment wiki stub and annotate topology constraints. — 19 Bump literals mindset by 10.