A Quantum Computer Operating at Room Temperature
Germany-based quantum technology startup SAXON Q has commercially launched its diamond-based quantum computing system capable of operating at room temperature. As the company's SXQ128 model becomes available for order with its 128-qubit capacity, it is stated that the system can be deployed in a standard server rack and operates without requiring specialized cryogenic cooling infrastructure.
Traditional superconducting qubit-based quantum computers rely on complex cooling systems that reach temperatures close to absolute zero to preserve quantum states. SAXON Q's approach, however, leverages the quantum properties of nitrogen-vacancy (NV) centers inside synthetic diamonds. This architecture allows the quantum processor to function at room temperature.
The company specifies that the SXQ128 can operate between 18–27 °C and runs on a standard mains power. This represents a different hardware approach aimed at reducing the dependency of quantum computers on specialized laboratory infrastructure.
Diamond NV Centers Used for Qubits
At the heart of SAXON Q's system lie nitrogen-vacancy centers in synthetic diamond crystals. An NV center is a point defect in the carbon crystal lattice of a diamond where a nitrogen atom replaces a carbon atom, leaving an adjacent lattice site vacant.
The electronic spin states of these centers are utilized for quantum information processing. The system prepares and controls these quantum states via laser and microwave pulses.
SAXON Q notes that it utilizes sulfur co-implantation during the manufacturing process to make the formation of nitrogen and vacancy centers more controlled. According to the company, this approach increases the yield of NV center production, helping to enable more qubits within the same system.
How Are 128 Qubits Positioned in the SXQ128?
A notable feature of the SXQ128 is that instead of gathering 128 qubits into a single quantum core, they are arranged within a multi-core architecture.
The system consists of 16 processing cores, with each core containing an eight-qubit structure. The company has reported gate fidelities of up to 99.92% for intra-core qubit operations.
However, an important technical distinction must be made. Having 128 physical qubits in the same system does not imply that all of them can achieve direct entanglement across a single quantum circuit. An independent evaluation highlighted that results regarding the SXQ128's inter-core entanglement capability have not yet been published, and the company's current architecture exhibits limitations in core-to-core connectivity.
Therefore, when evaluating the qubit count of the SXQ128, it is necessary to consider not only the total number of qubits but also how these qubits interact with each other and the system-level performance.
Why is Eliminating Cryogenic Cooling Important?
One of the most critical engineering hurdles preventing the widespread adoption of quantum computers is the complex infrastructure required for quantum processors to operate.
In systems utilizing superconducting qubits, the processor must be kept at extremely low temperatures. The cryogenic systems used for this purpose impose significant requirements in terms of physical space, power consumption, and maintenance.
SAXON Q's NV-center-based approach, on the other hand, allows the quantum processor to operate at room temperature. Consequently, the company positions its systems to be easily integrated into standard data center infrastructure and traditional server racks.
A significant outcome of this approach is the emerging possibility that quantum computing could be deployed not only in massive research laboratories but also in smaller, distributed systems.
Can Quantum Computers Be Carried to Robots and Vehicles?
SAXON Q does not limit the application of its technology solely to conventional data center use cases. The company's roadmap includes domains such as robotics, automotive, aerospace, defense, and Edge AI.
Particularly in robotics and autonomous systems, positioning a quantum processor locally on the platform has the potential to reduce latency in specific optimization and sensing problems compared to cloud-based quantum computing.
However, many of these use cases remain forward-looking targets. Thus, whether a room-temperature quantum processor will deliver practical advantages on mobile robots or vehicles will become clearer as higher qubit counts and verified system-level performances are achieved.
A 512-Qubit System is Also Coming
Following the SXQ128, SAXON Q has placed the higher-qubit SXQ512 model on its product roadmap. The company plans to offer the 512-qubit system starting from the second quarter of 2027.
In its longer-term roadmap, the objective is to reach a single quantum chip containing over 10,000 qubits. This target is projected for 2030 and beyond.
At this stage, the main engineering challenge lies not merely in scaling up the qubit count, but in manufacturing high-quality qubits, controlling them, enabling reliable inter-qubit interaction, and maintaining low error rates to establish a scalable quantum architecture.
A New Hardware Approach in Quantum Computing
SAXON Q's SXQ128 system demonstrates an important hardware approach regarding the future of quantum computers. Utilizing NV centers in synthetic diamonds demonstrates the feasibility of developing quantum systems that operate without cryogenic cooling and rely on standard power infrastructure.
Nevertheless, the commercial availability of the SXQ128 does not imply that quantum computers can now be operated as seamlessly as classical computers. Connectivity between qubits, error correction, scalability, and computational performance in real-world applications remain core topics that will dictate the future of this technology.
The primary significance of SAXON Q's approach emerges right here: The goal of transforming quantum computers from high-qubit laboratory setups into compact systems easily integrated into standard computing infrastructure represents a key direction to watch closely in the evolution of quantum technology over the coming years.