Ideas behind
the loop.
What changes when measurements are expensive, hardware moves, and the deadline stays fixed.
Third vendor, 156 qubits: the advantage widens as the problem grows
IBM Heron is the third commercial quantum processor to validate the loop live. The headline is 45.8% lower RMS error. The deeper result is the fixed-budget trend.
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Hardware validation: what two quantum processors settled
Two processors, one pre-registered ablation, one 107-channel closed loop, and the boundary of the framework drawn from both sides.
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Three axes of advantage: what wins, when, and where
A method can win on measurement efficiency, optimization quality, or regulation under drift. Confusing the axes hides the real result.
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The starved-budget regime
When the budget is tight enough, the method, not the math, decides whether the loop can finish.
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Reproduce it yourself
The useful artifact is not a chart. It is the script that makes the chart on a fresh problem, with disclosed seeds and baselines.
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When every measurement costs you
Some problems are slow because every objective evaluation is a physical event. The optimizer must be priced in measurements, not iterations.
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The configuration is the state
Retaining the physical configuration changes the shape of the loop and the economics of the next decision.
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Knowing when not to use it
Applicability follows from structure. Performance is measured on the customer plant, never forecast.
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