SAXON Q Starts Selling Room-Temperature Diamond Quantum Computers

German company SAXON Q says it’s now taking orders for quantum computers that run at room temperature in an ordinary server rack. The machines use nitrogen-vacancy centers in diamond, an approach that avoids the cryogenic plumbing and vacuum systems most quantum hardware depends on. The company markets them as the SXQ128 and SXQ512.

How SAXON Q’s diamond quantum computers work

The product names suggest 128 and 512 qubits, but the architecture is what’s important here. According to the July 21 press release, SAXON Q says the SXQ128 provides eight fully entangled qubits per core and the SXQ512 provides sixteen, with computation coordinated across multiple cores. That is a different machine from one with 128 or 512 qubits entangled together, and the difference affects which problems it can handle.

The more substantive claim is about manufacturing. Turning implanted atoms into working qubits normally succeeds only 1 to 10% of the time in NV-centre systems, a yield problem that has held the approach back for decades. SAXON Q says its sulfur co-implantation process exceeds 85%. It also reports qubit fidelity up to 99.92% and energy efficiency 6 to 10 times better than GPU-based approaches.

Which claims does evidence support?

Those figures are the company’s own, with no independent benchmarks or published results cited. The same applies to its claims of being the first NV-centre system past 10 qubits and the only one coordinating multiple cores.

What gives the announcement more weight than a typical launch is that customers are already using earlier hardware. The German Aerospace Center and Fraunhofer IWU deploys previous-generation systems, where Albrecht Hänel said a mobile SAXON Q system has run continuously at room temperature since June 2025 and beat the gate fidelity specified in their tender. That is a named third party describing real operation.

“We began using a Saxon Q mobile quantum computing system in June 2025 for industrial optimization in material processing and robotics. (…) The system has operated at room temperature continuously since installation — and has exceeded the gate fidelity specifications we outlined in the tender.”

The SXQ128 ships within three months of order. The SXQ512 is slated for deliveries starting in the second quarter of 2027. Pricing is bespoke and was not disclosed. Error correction and logical qubits remain on the roadmap.