Evidence you can inspect.
Boundaries you can trust.
The public record separates real-hardware measurements, controlled simulation, and time projections.
The sequential control cost did not grow across the tested range.
Two different controllers each passed 210 of 210 frozen trials from 16 to 65,536 controlled channels. For the retained controller, median acquisitions to contract moved from 11.5 to 12.
Real QPUs
Quantum Inspire Tuna-9: three of three trials entered contract at acquisition four.
Rigetti Cepheus: 48 controlled channels entered contract at acquisition four in one paired seed.
Commanded disturbances; no provider-private calibration registers; no hardware scaling exponent.
Controlled simulation
Primary result: 210 of 210 passes per confirmed controller across seven widths.
Extension: five of five runs at one million channels for each qualifying controller.
Tested over a finite range; not proof that every scale or device will behave the same.
Why this changes time to a usable solution.
At a fixed physical acquisition latency, a bounded number of sequential device visits stays fast. A width-dependent calibration sweep does not.
100 million controlled channels100 µs per physical acquisition
Qualifying retained controller2.0 ms20-acquisition no-growth projection
Scheduled sweep, 1,024 channels per frame9.77 s97,660 sequential acquisitions
Dense finite difference2.78 hminimum time to form the first complete update
Projection anchored to measured QSC-Bench acquisition counts. Acquisition-only: serial host work, interface bandwidth, actuation, and settling are excluded. The current NumPy implementation is not a 2 ms end-to-end system.
The public result, in five lines.
QSC-BENCH PRIMARY210 / 210passes per confirmed member
Seven widths and thirty frozen confirmation seeds per width. Controlled simulation.
PRIMARY RANGE16 → 65,536controlled channels
Median acquisitions for the retained controller moved from 11.5 to 12.
DEVELOPMENT EXTENSION1,000,000controlled channels
Five of five runs passed for each qualifying controller. Not part of the frozen 30-seed inference.
REAL QPU3 / 3Tuna-9 hardware trials
Contract entry at acquisition four in every trial.
REAL QPU48controlled Cepheus channels
Contract entry at acquisition four in one paired seed across 96 physical qubits.