German quantum computing startup SAXON Q has announced the commercial release of the SXQ128 (128 qubits) and the SXQ512 (512 qubits), marking the first diamond-based nitrogen-vacancy (NV) center quantum processors to exceed ten physical qubits. Spun out of Leipzig University, the company’s systems operate entirely at room temperature without requiring cryogenic refrigeration, vacuum infrastructure, or specialized cleanroom facilities. The units are designed to slide directly into standard server racks, drawing power from standard AC wall outlets while operating with 6–10x higher energy efficiency than GPU-based classical hardware clusters.
Scaling Conversion Yields via Sulfur Co-Implantation
A primary engineering bottleneck in diamond NV-center quantum computing has historically been low conversion yield—the percentage of implanted nitrogen atoms that successfully form stable, functional qubit centers inside the diamond lattice. Traditional fabrication techniques typically yield between 1% and 10% conversion rates.
SAXON Q resolves this manufacturing constraint through a proprietary sulfur co-implantation process, protected by more than 220 patents and applications:
- High-Yield Qubit Creation: The sulfur co-implantation technique achieves conversion yields exceeding 85%, enabling precise, high-density placement of NV centers within the diamond substrate.
- High Single-Gate Fidelity: The resulting NV qubits deliver single-gate fidelities up to 99.92% (<1 error per 1,000 operations), maintaining state stability long enough to run complex, multi-step algorithmic calculations.
- Multi-Core Modular OS: The platform introduces a multi-core quantum architecture operated by a proprietary QOS. The SXQ128 delivers 8 fully entangled qubits per processing core, while the SXQ512 expands capacity to 16 entangled qubits per core. Systems can be upgraded modularly by swapping diamond chips or adding processing cores.
Commercial Deployments and System Availability
SAXON Q’s earlier-generation room-temperature systems are already actively deployed on-premises and via cloud APIs at research institutions, including the German Aerospace Center (DLR) and the Fraunhofer Institute for Machine Tools and Forming Technology (IWU), where they are utilized for industrial material processing and robotics optimization. The systems target near-term applications in quantum convolutional neural networks (QCNNs), variational quantum algorithms, materials research, and quantum chemistry simulations:
- SXQ128 (128 Qubits): Available to order immediately, with initial customer deliveries scheduled within three months (late summer 2026).
- SXQ512 (512 Qubits): Available for advance purchase, with customer shipments commencing in Q2 2027.
Led by CEO Prof. Dr. Marius Grundmann and CTO Prof. Dr. Jan-Berend Meijer, SAXON Q plans to scale its multi-core architecture toward data-center co-processors and logical qubit error-correction roadmaps targeting 10,000+ qubits.
Review the official hardware deployment release on HPCwire here.
July 21, 2026
