Beyond Classical Computing: Seed IQ Quantum Computes the Hydrogen Chain to H100

AIX Global extends the established Motta hydrogen-chain benchmark from H10 to H100, demonstrating meaningful quantum computation in a regime beyond exact classical reach.

In June 2026, AIX Global published the results of our governed fault-tolerant quantum computing campaign, demonstrating FTQC execution and quantum chemistry computation on publicly accessible superconducting quantum hardware.

Then we went back to work.

In July 2026, Seed IQ crossed another threshold.

Using Seed IQ Governed Fault-Tolerant Quantum Computing, AIX computed exact ground-state energies for the linear hydrogen chain, one of the canonical benchmarks in many-electron quantum chemistry, extending the computation from the established classical H10 benchmark all the way to H100.

For years, much of the quantum computing conversation has centered on the machine itself: qubits, fidelity, circuit depth, error rates, and whether a quantum processor can outperform a classical computer on a specialized benchmark.

We believe the more important question is simpler:

Can quantum computing calculate something that matters that classical computing cannot?

The hydrogen chain provides an unusually clear way to answer that question.

In 2017, Motta et al. established a definitive H10 benchmark through a major collaborative effort involving twenty authors, fifteen institutions, and more than fifteen classical many-body methods. The resulting full-configuration-interaction equation of state became an accepted reference for evaluating exact solvers.

Seed IQ first reproduced the Motta H10 benchmark exactly, matching the published result while extending its numerical precision.

Then we continued past it.

The July computations extend the hydrogen chain to H100 and across four chemical basis sets, from STO-6G through cc-pVTZ. At H100, the configuration space exceeds

determinants, a scale that cannot be stored or exactly solved by conventional high-performance computing. The paper reports that, to our knowledge, these exact hydrogen-chain energies beyond Motta’s H10 benchmark had not previously been computed by any classical or quantum method.

These are not extrapolated values or fitted curves. Every reported value from H2 through H100 is a governed FTQC commit with its own internal certificate of exactness.

This is why we believe the result represents something more important than another quantum benchmark.

The computation crosses a boundary.

Motta established what exact classical computation could reach. AIX’s Seed IQ reproduces that reference and then continues beyond it, into larger systems and richer chemical representations where exact classical computation is no longer accessible. The July work extends the benchmark from H10 to H100, into a configuration space exceeding determinants.

For much of the quantum industry, the race is still centered on the machinery of quantum computing itself: scaling hardware, increasing code distance, improving error correction, managing noise, reducing reliance on post-selection, and demonstrating increasingly controlled experimental results as evidence of “quantum advantage” or “quantum supremacy.”

Those are important engineering challenges.

But the real value of quantum computing begins on the other side of them.

The purpose of fault-tolerant quantum computing is not simply to prove that fault-tolerant quantum computing works. It is to use it to compute what could not be computed before.

That is the frontier that AIX has moved into.

After publishing our governed FTQC results in June, we did not stop at demonstrating the capability. We have established a proprietary quantum compute pipeline and began using it. The hydrogen-chain results announced today were computed in July 2026, only weeks later.

And we have been quietly computing ever since.

We have been using quantum computation to pursue answers, discoveries, and solutions whose value exists independently of the quantum computer that produced them…Because we can.

This is where real quantum economic value begins.

So the question now is: What else have we computed?

The full paper, “Demonstrating Quantum Value on the Hydrogen Chain: Exact Ground-State Energies Exceeding the Motta (2017) Benchmark, Beyond the Reach of Classical Computing and HPC,” is now available on Zenodo.