Sixty Cents of Entanglement

I ran a quantum circuit on real hardware for sixty euro cents. Two qubits, entangled, measured a thousand times, on a trapped-ion processor sitting in a datacenter somewhere in Europe. The whole thing — from pip install to results on actual quantum hardware — took under an hour.

The platform is Scaleway. French cloud provider, better known for cheap VPS boxes. They have a quantum-as-a-service offering that connects to real hardware from IQM (superconducting) and AQT (trapped ion). A few cents per execution. Thin wrapper around Qiskit.

The circuit

A Bell state: the “hello world” of quantum computing. Hadamard gate puts the first qubit into superposition, CNOT entangles it with the second. Measure. You should get 00 or 11, roughly 50/50, nothing else. Two qubits correlated in a way that has no classical equivalent.

First the emulator — a classical simulation. 1000 shots: 475 times 00, 525 times 11. 100% fidelity. Perfect by design, no noise. Confirms the circuit works before burning QPU time.

Then real hardware. QPU-GARNET-20PQ, an IQM superconducting chip with 20 qubits. 200 shots. Result: roughly 97% fidelity. Three percent noise — real physical noise from decoherent qubits, imperfect gates, crosstalk on the chip.

That three percent is the interesting part. On the emulator, quantum computing is just matrix multiplication with extra steps. On real hardware, it’s a physical process in a cryogenic chamber colder than deep space. The 97% says the hardware works. The 3% says quantum computing is still hard.

The cost

A cappuccino costs more than running a quantum circuit on real hardware. The barrier in 2026 is not money, not access, not tooling. It’s knowing what to compute.

Quantum advantage — problems where quantum genuinely outperforms classical — remains narrow. Certain optimization, specific crypto, some molecular simulations. For most computing tasks, classical is faster, cheaper, and more reliable. Scaling from a clean Bell state to the hundreds of error-corrected qubits needed for practical advantage is a different engineering challenge entirely.

What it is

Not a breakthrough. A Bell state is textbook. The circuit has been run millions of times.

What it is: proof that the access barrier collapsed. A Scaleway account, a Python script, sixty cents, and you’re running circuits on real quantum hardware. The results won’t be useful for production. But the education value — seeing real noise in your own data, understanding viscerally what 97% fidelity means — that’s worth it.

The interesting experiments are the ones that come next. For the cost of a coffee. On hardware that exists today. Without asking anyone’s permission.