Knob-Based Certification of Magnetic Sweet Spots in Hole Spin Qubits

Significant — This work takes the “magnetic sweet spots” story for hole spin qubits and turns it into a standards-ready control program instead of a one-off tuning narrative. The core move is to treat magnetic-field orientation as a first-class coordinate layer and the sweet spots as an extended manifold (not a fragile point), then bind operation to preregistered acceptance lines and replayable tokens so the claim survives drift, device variation, and calibration error rather than being rescued by post hoc selection. The paper explicitly encodes the result as a triad—noise insensitivity, drive efficiency, and orientation—and adds explicit failure sinks (null pressure, drift proxy, yield/SoZ) so borderline regions cannot be laundered into success by averaging. It also blocks the common “one global angle fixes all” misread by proposing a multi-level knob hierarchy (global orientation policy + local gate policies + audit schedules) and a three-bench contract (baseline, stress, portability) so “works on this device today” is separated from “portable and replayable under stress.” The net contribution is a reusable certification wrapper for sweet-manifold operation: it does not change the physics, it changes what is allowed to count as a scalable operating point.