Welinq and Sparrow Quantum formalized their collaboration on November 10, 2026, signing a Memorandum of Understanding to build a first cluster of processors that links Sparrow Quantum’s photonic qubits with Welinq’s quantum networking. This partnership represents a concrete step toward scaling quantum computing through modular architectures, where multiple processors interconnect and operate as one unified system.
Welinq’s latest research indicates that these distributed architectures facilitate quantum error correction, suggesting the network itself is key to achieving fault tolerance; the company explains that “the road to fault tolerance runs through the network.” By combining expertise, the companies aim to strengthen Europe’s development and deployment of quantum computing infrastructure.
Sparrow Quantum Photonics Integrate with Welinq’s Multi-Platform Clusters
The initial cluster will be deployed on premises in high-performance computing centers and data centers, with cloud access planned for end-users, eliminating the need for direct hardware management. Welinq’s approach centers on aggregating diverse quantum processor providers, building a network that transforms individual machines into a unified cluster. This strategy acknowledges the limitations of scaling a single qubit platform and anticipates a future where heterogeneous infrastructures dynamically assign workloads to the most suitable processors.
Welinq’s latest research supports this direction, demonstrating that distributed architectures simplify quantum error correction by distributing logical qubits across entangled processors, the company says. “The future of quantum computing will not be defined by individual processors alone, but by how we connect them into larger, more powerful systems,” says Peter Lodahl, CEO of Sparrow Quantum. The compatibility of Sparrow Quantum’s technology with Welinq’s network is a key advantage.
Photonic qubits, carried by light, align smoothly with Welinq’s optical network designed to connect processors. Sparrow Quantum’s deterministic single-photon sources deliver photons on demand, offering exceptional purity and indistinguishability, and are already in use by quantum computing companies and research labs throughout Europe. The companies will interface Sparrow Quantum’s photonic qubit and quantum light technologies with Welinq’s quantum networking solutions, in a first deployable cluster of processors. It represents a deliberate effort to strengthen Europe’s position in developing and deploying critical quantum computing infrastructure.
“Partnering with Sparrow Quantum is a concrete step in building that infrastructure,” says Tom Darras, CEO and co-founder of Welinq. “Together, we are bringing photonics into the modular, heterogeneous quantum clusters Welinq is developing for data centers.” The companies intend to scale Sparrow Quantum’s photonic processors within these clusters, offering a flexible capacity model for data centers that allows them to add quantum computing resources as demand increases. This approach differs from the traditional model of investing in a single, monolithic quantum machine.
Welinq, a spin-out from Sorbonne Université, CNRS and PSL University, is building interconnected, secure quantum infrastructure, and Sparrow Quantum is among the first platforms to join. The collaboration aims to move beyond the limitations of individual qubit technologies, focusing instead on the ability to connect complementary platforms into scalable systems. The companies are positioning this networked approach as essential for realizing the full potential of quantum computing, emphasizing that the future lies in interconnected systems rather than isolated processors.
Quantum computing will not be defined by a single winning qubit technology, but by our ability to connect complementary ones into scalable systems.
Tom Darras, CEO and co-founder of Welinq
See today’s quantum computing news on Quantum Zeitgeist for the latest breakthroughs in qubits, hardware, algorithms, and industry deals.
