Gate Fidelity Drift and the Calibration Data Vendors Publish

QuantufAI Labs · 2025-01-10

Quantum hardware is not stationary. Gate fidelities drift between calibration cycles, qubits get retuned, and the device you benchmarked on Monday is not quite the device running your circuit on Friday. A fidelity figure quoted without the date of the calibration behind it describes a device that may no longer exist.

What we read

QuantufAI reads the calibration data that hardware vendors publish for their devices: reported gate fidelities, coherence times, and readout errors.

The word "reads" is doing deliberate work in that sentence. These are the vendors' own reported calibration figures, relayed with provenance — not fidelity measurements QuantufAI performed independently. What we add is the cross-vendor view: the same figures, normalized and timestamped.

The honest boundary

We publish what we can substantiate: which vendors' devices we read calibration data from, when it was last refreshed, and what it said. We do not publish achieved-fidelity benchmarks of our own; we will not print a benchmark number we have not measured.

Reflects integration and availability, not benchmarked results. Every paid hardware run needs a server-signed quote, a budget cap and one explicit approval. Access varies by provider: Quantinuum is currently plan-limited to its emulator.

— QuantufAI Labs