Saxon Q Unveils 128 Qubit NV Quantum Computer. Welcome SXQ128 System.

SAXON Q is delivering on a promise long confined to research labs: practical quantum computers operating at room temperature. The company announced the commercial availability of its 128-qubit SXQ128 system, with a more powerful 512-qubit SXQ512 slated for release in Q2 2027, marking the first diamond-based NV-center quantum computer to exceed 10 qubits. Protected by more than 220 patents and pending applications, these systems bypass the need for cryogenic cooling and complex infrastructure, fitting within standard server racks and offering a potential six to ten-fold improvement in energy performance compared to GPU-based approaches. “For thirty years, NV-center quantum computing was a question of manufacturing—whether we could place qubits with enough precision and yield to build something that works outside a laboratory,” said Marius Grundmann, co-founder and CEO of SAXON Q. “We solved that problem.”

Diamond-Based NV-Center Technology Enables Room-Temperature Quantum Computing

Protected by a portfolio exceeding 220 patents and pending applications, SAXON Q is challenging conventional quantum computing paradigms with its diamond-based nitrogen-vacancy (NV) center technology. The company’s recent announcement details the commercial availability of the SXQ128 and SXQ512, marking the first time diamond-based quantum computers exceeding 10 qubits have reached the market. Unlike systems requiring complex cryogenic cooling, these processors operate at room temperature, eliminating significant barriers to adoption for organizations seeking to explore quantum capabilities. Both systems are designed for standard server racks and electrical units, promising continuous operation without the recalibration typically associated with quantum hardware. This simplified infrastructure contributes to substantial energy savings; SAXON Q reports consistently demonstrating six to ten times better energy performance compared to GPU-based quantum approaches. The SXQ128 is geared toward near-term workloads like variational algorithms and quantum chemistry simulations, while the SXQ512 expands computational power for more demanding research.

Currently, two prior-generation SAXON Q systems are actively used at the German Aerospace Center (DLR) and Fraunhofer IWU, with researchers accessing them both on-site and via cloud API. Albrecht Hänel, Head of Digital Production Twin, Fraunhofer IWU, said, “We began using a Saxon Q mobile quantum computing system in June 2025 for industrial optimization in material processing and robotics.” He added that the system has operated at room temperature continuously since installation and has exceeded the gate fidelity specifications outlined in the tender. A key innovation lies in SAXON Q’s proprietary sulfur co-implantation process, achieving greater than 85% conversion yield, a significant improvement over the 1-10% typically seen in traditional NV-center creation methods. This advancement results in qubits achieving up to 99.92% fidelity, with stable quantum states capable of supporting complex calculations.

SAXON Q’s recent systems represent a departure from conventional quantum computer design, prioritizing practical deployment over cryogenic infrastructure; the SXQ128 and SXQ512 both operate at room temperature without requiring vacuum equipment or specialized facilities. This process contributes to qubit fidelity reaching up to 99.92%, translating to fewer than one error per 1,000 operations. The SXQ128 and SXQ512 are unique in their ability to coordinate computation across multiple quantum processing cores simultaneously, offering eight and 16 fully entangled qubits per core, respectively; this modular design allows for scalability, with organizations able to upgrade their systems over time.

SAXON Q has overcome a critical hurdle in scaling quantum computing through a refined manufacturing process centered on sulfur co-implantation. Traditional nitrogen-vacancy (NV)-center creation methods typically yield functional qubits only 1-10% of the time, but the company reports achieving conversion yields exceeding 85%. The increased qubit density is enabled by this proprietary process, which significantly improves the efficiency of transforming implanted atoms into usable quantum bits. This advancement isn’t merely about quantity; the resulting qubits demonstrate up to 99.92% fidelity, meaning fewer than one error occurs per 1,000 operations, and maintain stable quantum states for extended calculations. This level of stability is crucial for running complex, real-world simulations without significant data degradation.