Lesson 120: Variational loop sketchpads
Focus
Treat placeholders as mandatory—rename qubit lines and budget shots immediately. Token Variational loop sketchpads:120 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Variational loop sketchpads · drill v10 · spin
587787. - 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
Simulator-vs-hardware rollup
| Artefact | Honesty check |
|----------|---------------|
| Exact statevector (n<21) | qubit ceiling note |
| Noisy emulation | pauli/channel parity |
| Device trace | leakage / crosstalk tag `spike` |
Hypothesis `success amplification lift` ties lesson 120 to observables not vibes.
Practice
Practice Pair device SME review for basis translation—even on toy circuits. — 120 Bump literals mindset by 34.