Quantum measurement and control integrity
QCIG
Live-result integrity for quantum stacks
Proving a result labelled live never used data from the future.
QCIG verifies that every live result came from the past alone, blocks the ones that did not, and issues a signed verdict that states the smallest hidden look-ahead it rules out.
UK Patent Filed GB2627001.7 · QCIG is a Physivitis product
A live trace that stops at NOW, with future data blocked before it reaches the answer
The gap
A live result is trusted on the strength of a timestamp
Quantum controllers react in microseconds, and their speed is measured carefully. Whether a live result secretly used later data is never checked. A smoothed trace, a delayed pipeline or a clock that has drifted can all produce an answer that looks real-time and is not.
In computing that means feedback and key release acting on a result the processor could not yet have had. In sensing and communications it means a sensitivity or response claim that no live decision was entitled to make.
What it catches
Three ways a live claim bends
Smoothed with future data
Offline clean-up, presented as a real-time result. The maths is sound, the timing claim is not.
Hidden look-ahead
Processing that waits for data it claims not to have before it commits to an answer.
Misaligned clocks
Timestamps that make a late answer look early, through drift, buffering or an unverified clock.
How it works
Six steps from a live claim to a signed verdict
Seal the challenge
QCIG injects an unpredictable probe signal, sealed with a cryptographic code, so no record can be replayed or realigned later.
Record against trusted time
Everything that goes into the device, and everything it claims as its live answer, is captured and timestamped by a trusted clock.
Learn the signal
QCIG builds a model of the signal and tracks every surprise the model did not predict.
Run the key test
QCIG removes everything the past can explain, from both the device’s answer and the future surprises. If any link remains between them, the answer was looking ahead.
Reach a fair, stated verdict
The decision threshold is calibrated from the data itself, so honest devices are not falsely accused. Every verdict states the smallest hidden look-ahead it can rule out.
Enforce and record
Failed results are blocked by a hardware interlock before they reach feedback or key release. Every verdict becomes a signed, chained certificate that anyone can check.
What it does not need
Nothing to re-engineer before a pilot starts. The first verdict comes from the stack you already run.
- No changes to your hardware or firmware
- No access to your source code
- No probe traffic beyond the sealed challenge itself
- No labelled training data
- No slow-down of the live control loop
What you get
Six things every verdict carries
A verdict is not a badge. It says what was tested, what it ruled out and who can check it afterwards.
- Live-integrity verdict: PASS, INCONCLUSIVE or FAIL for every claimed live result
- Stated sensitivity floor: every verdict says exactly what it rules out
- Signed, chained certificates: tamper-evident records anyone can check
- Hardware interlock: failed results never reach feedback or key release
- Replay-resistant records: sealed challenges and trusted timestamps
- Works beside existing hardware: no changes to the device under test
Who uses it
Quantum computing
Control-stack vendors and processor teams running real-time feedback.
Quantum sensing
Developers proving real-time sensitivity and response claims.
Quantum communications
Receivers that must show a decision used only data available at the time.
Research and metrology
Labs and institutes that need a reference test for live claims.
Built for
How it is delivered
Three ways to put QCIG to work
Evaluation access available
Software toolkit with trusted timing
For quantum labs and metrology institutes. Verifies recorded results and issues signed certificates.
Available for licensing
Embedded in quantum controllers
Licensed into control-stack hardware, so integrity checks and the interlock run inside the controller.
Design partners forming
Evaluation bench
For quantum sensor testing and procurement, issuing a certificate for each evaluation.
Status
Where QCIG stands today
Patent
UK application GB2627001.7 filed
Core method
Simulation-validated across the full range of hidden look-ahead, from blatant to subtle
Next
Hardware pilots with design partners on commercial control stacks; now inviting partners
Questions
What teams ask before a pilot
Evaluation
Bring QCIG to your quantum stack
Tell us what you run and what you need to prove. We will come back within two working days with the shortest path to a first verdict.
UK Patent Filed GB2627001.7 · QCIG is a Physivitis product