Quantum Coherence Technologies

Coherence-Guided Stabilization

CGS — Coherence-Guided Stabilization

Quantum circuits degrade. The deeper you go, the more noise accumulates, the less reliable the output. Different platforms, same struggle.

CGS is a software protocol that mitigates it.

No hardware modification required

97–99%

Variance Reduction

Hardware Platforms

2,000

Gates — Stable

1.5:1

Qubit Overhead

The Challenge

Quantum Systems Drift

As circuits get deeper, accumulated noise causes results to become unpredictable — forcing teams to limit circuit depth, multiply shot counts, or accept unreliable output. Every quantum platform faces this. CGS addresses it directly, in software, on existing hardware.

High Variance

Run-to-run results fluctuate wildly, requiring excessive shot counts to extract reliable answers.

Depth Limits

Useful algorithms require deep circuits, but coherence degrades rapidly — often within microseconds on superconducting hardware.

Cost Scaling

More shots means more compute time and cost. Unreliable results multiply the expense of every quantum workload.

Validated Results

Hardware-Proven Performance

These are not simulations. CGS has been validated on commercial quantum hardware across three independent architectures — superconducting and trapped-ion. The results are consistent, reproducible, and available on request.

Shot-to-Shot Variance Over Circuit Depth — CGS vs Baseline

Shot-to-shot variance · Rigetti Ankaa-3 · 2,000 gates · CGS stays flat while baseline swings wildly

Fidelity Stability Over Circuit Depth — CGS vs Baseline

Fidelity stability · Rigetti Ankaa-3 · 2,000 gates · 98.8% avg variance reduction · Baseline collapses. CGS holds.

Swipe to view full table

Platform	Test	Qubits	Gates	Variance Reduction	Fidelity (Baseline → CGS)
Rigetti Ankaa-3 Superconducting	Single Triad Depth Validation	3	2,000	98.8%	Baseline: 0.55→0.21 (collapsing) CGS: 0.49–0.52 (stable band)
IQM Emerald Superconducting	Frame Sweep (5 configurations)	3	100	99.6%	Baseline: 0.04 CGS: 0.49 (stable band)
IonQ Forte Trapped-Ion	Cross-Technology Validation	3	100	97.8%	Baseline: 0.84 (high, chaotic) CGS: 0.53 (stable, low variance)
Rigetti Ankaa-3 Superconducting	3-Triad Scaling (identical programs)	9	1,000	99.5 / 98.8 / 99.7% Avg: 99.3%	Baseline: 0.28 / 0.28 / 0.24 CGS: 0.49 / 0.51 / 0.48
Rigetti Ankaa-3 Superconducting	Multi-Program Scaling (differentiated functions)	9	1,000	99.6 / 99.1 / 98.8% Avg: 99.2%	Baseline: 0.28 / 0.28 / 0.25 CGS: 0.51 / 0.52 / 0.55

97–99% variance reduction is not a single result. It is a pattern — repeated across superconducting qubits, trapped ions, and five independent test configurations.

Why This Is Significant — T2 Context

Every qubit has a T2 coherence time — the window during which it can hold phase stability before environmental noise takes over. On Rigetti Ankaa-3, the vendor-measured T2 of the most noise-sensitive qubit in the CGS triad is 23.3 microseconds.

At 2,000 gates, CGS is running circuits that execute in 128 microseconds — 5.5× beyond that T2 limit — while holding 48–52% fidelity and 97–99% variance reduction across every depth tested.

No hardware modification. A 1.5:1 qubit ratio.

Business Value

What This Means in Practice

1.5:1

qubit overhead

Efficient Architecture

CGS achieves its results with minimal qubit overhead — 9 qubits doing structured work that conventional approaches require orders of magnitude more to attempt.

5.5×

beyond T2 limit

Extended Circuit Depth

Run circuits well beyond each platform's native coherence limit — validated on production hardware, not simulation.

platforms validated

Hardware Agnostic

One software protocol. Superconducting and trapped-ion architectures. The same triadic structure adapts to each platform's native timing.