ROTONIUM UNVEILS A QUANTUM COMPUTER THAT OPERATES AT ROOM TEMPERATURE
Quantum computer prototype requires no cryogenics, aiming to cut the cost, size and energy use of quantum computing
Padua, 11 November 2026: Rotonium has unveiled a quantum computer prototype that operates at room temperature, with no cryogenic cooling anywhere in the quantum chain: from the single-photon source to the processor and the detectors that read the results.
The machine houses a photonic quantum processor with four effective qubits on a chip measuring just 18 by 4 millimetres. Rotonium defines effective qubits as qubits that can be used together in a verified computation under the stated test conditions. The technology encodes quantum information in different properties of a single photon, known as degrees of freedom, making it possible to represent multiple qubits within one photon. It is protected by six patent families, with 25 patent applications and six patents granted, and is designed for manufacturing processes compatible with silicon photonics.
Rotonium’s approach targets edge quantum computing: compact quantum accelerators that can be integrated into industrial systems, robots, autonomous vehicles and satellites, where size, weight and power consumption are critical.
“Quantum computing must not become a technology reserved for a handful of large research centres,” says Roberto Siagri, co-founder and CEO of Rotonium. “What matters is not only how many qubits we can develop, but how usable they really are at the edge. This is what we call Industrial Quantum Utility.”
“The entire system operates at room temperature, without cryogenics”, explains Fabrizio Tamburini, co-founder and Chief Quantum Officer of Rotonium. “Our prototype demonstrates the feasibility of compact photonic circuits and provides the foundation for a progressive increase in computing capacity.”
The company’s roadmap foresees a desktop system with 16 effective qubits in 2028, a PCI Express accelerator card with 32 effective qubits in 2029, and a System-on-Module with 96 effective qubits by 2030, with thousands of effective qubits targeted by 2035.
