SAXON Q reports achieving a 77.3% success rate with its three-qubit Grover search algorithm at room temperature, rivaling the 78% success rate of the best published superconducting result, which required temperatures roughly 15,000 times colder. Running the benchmark on a diamond-based system at a customer site, the company demonstrated full-system performance by searching a list of eight items, SAXON Q says. “The assumption in quantum computing has been that you trade performance for convenience,” said Marius Grundmann, co-founder and CEO of SAXON Q. “These results show that tradeoff isn’t necessary.”
Room-Temperature Grover Search Achieves 77% Success with Three Qubits
SAXON Q achieved a 77.3% success rate. This demonstration, conducted on a commercial diamond-based system, marks the highest three-qubit Grover search performance reported to date without the need for cryogenics or vacuum equipment. The results, published recently, challenge the long-held assumption that quantum computing performance necessitates substantial infrastructure and energy expenditure. The benchmark used Grover’s algorithm to search through a list of eight items, successfully identifying a single target state in 77.3% of attempts.
By comparison, a conventional computer would achieve a maximum success rate of only 37.5% with the same task, highlighting the quantum advantage demonstrated by the SAXON Q system, according to the company. When the search expanded to two targets, the quantum processor’s success rate rose to 87%, exceeding the classical limit of 46.4%. This full-system performance measurement, unlike component-by-component testing, confirms the integrated functionality of the SAXON Q hardware and software.
Fraunhofer IWU in Dresden, Germany, hosted the system during the benchmark testing in June 2025, and researchers co-authored the resulting paper. “Our researchers worked on this benchmark alongside SAXON Q’s team, so we know exactly how these results were measured and what they mean for our work,” said Albrecht Hänel, head of Digital Production Twin at Fraunhofer IWU.
“Seeing the system perform at this level on our own site gives us confidence to take on more demanding work in industrial optimization and robotics.” The system’s operation at room temperature and with a power consumption of roughly 600 watts contrasts sharply with superconducting systems, which can demand over 25 kilowatts and require complex cooling infrastructure. SAXON Q’s advancement builds on previous NV-center demonstrations by computing entirely on the nuclear spins of atoms within a diamond, extending quantum information storage time by a factor of roughly 1,000, the firm reports. This approach allows for greater stability and coherence, which is important for complex quantum computations.
The experiment used a previous-generation SAXON Q quantum computer, preceding the company’s recently announced SXQ128 and SXQ512 systems. The SXQ128 is currently available for order, with SXQ512 deliveries scheduled for the second quarter of 2027. The company’s CEO, Marius Grundmann, emphasized the implications of these findings for wider accessibility. “Our system ran a complete quantum algorithm in an ordinary room at a customer site, and the results were similar to those of machines that require extensive infrastructure to cool them to near absolute zero,” he stated.
The assumption in quantum computing has been that you trade performance for convenience. These results show that tradeoff isn’t necessary.
Marius Grundmann, co-founder and CEO of SAXON Q
Source: https://saxonq.com
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