Qblox

Qblox to develop integrated control stack for €47.5M EU QIA full‑stack quantum network project

The European Commission is providing €47.5 million to the Quantum Internet Alliance (QIA) for its second phase, SGA2. Over 42 months, QIA will build a programmable full‑stack prototype capable of running quantum network applications. Qblox will develop the control stack and hardware interfaces to connect long‑distance networks.

✍️ Quantum Index Analysis
We explain the technical and business significance behind the announcement and evaluation points that are not obvious from numbers or headlines alone. Read our original analysis ↓

Announcement overview

Led by TU Delft, the QIA is a consortium of more than 50 institutions across 12 European countries, including research institutes, telecom operators, system integrators and quantum technology companies. The first phase, SGA1, ran from October 2022 to March 2026 and integrated hardware, software and network research to establish the technical foundation for a quantum network prototype. In SGA2, the project will move from developing individual technologies to integration, aiming to deliver a complete, programmable prototype capable of running quantum network applications. Key objectives include a demonstration that interconnects two city‑scale quantum networks using quantum repeaters over long‑distance optical fiber. Qblox developed control hardware for quantum network nodes during SGA1. In SGA2, it will be responsible for the control stack and hardware interfaces required for long‑distance connections. The plan also includes initial preparations for a quantum‑internet demonstration facility and an open‑access infrastructure for researchers, developers and companies.

Key points

  • The European Commission is allocating €47.5 million to QIA’s SGA2, supporting 42 months of R&D.
  • The goal is to build a programmable full‑stack prototype capable of running quantum network applications.
  • A key demonstration will interconnect two city‑scale quantum networks using quantum repeaters over long‑distance optical fiber.
  • Qblox will develop the control stack and hardware interfaces for long‑distance networks.
  • Preparations for a demonstration facility and an open‑access infrastructure aim to accelerate practical adoption of research results.

Technical and business implications

Technically, the project marks a shift from researching individual elements of quantum networks toward a full‑stack prototype that integrates quantum repeaters, city‑scale networks, control systems and application execution environments. In particular, demonstrating the connection of two separate city‑scale networks over long distances will be an important integration milestone for network scaling. From a business perspective, preparing an open‑access infrastructure and demonstration facility could provide environments for researchers and companies to test technologies. However, the project does not specify commercial timelines, concrete performance metrics, pricing or mass‑production plans; at this stage it should be evaluated as a research and development program.

What to watch next

Attention will focus on the conditions and performance under which the connection demonstration between two city‑scale networks via quantum repeaters is achieved. In addition, observers will look for concrete demonstrations of applications running on the full‑stack prototype, the integration status of Qblox’s control stack with other devices, and details on how the open‑access facility will be used. To assess commercial prospects, it will be important to see which users are targeted, the terms of provision, and operational performance metrics that may be published going forward.

✍️ Quantum Index Analysis

What is notable in this announcement is not just the €47.5 million budget, but that Qblox is expanding its business from control equipment for quantum computers into the control layer of quantum networks.

This is not an abrupt pivot. Within QIA, Qblox already leads the “Stack and Integration Team,” responsible for the software/network stack and the hardware interfaces between intra‑city and long‑distance networks. The company has also commercialized the QubitQuantum Bit / QubitThe basic unit of information in a quantum computer. It can represent not only 0 or 1 but also a quantum state that is a superposition of them.QI NoteHaving more qubits does not necessarily mean higher performance. Error rates, connectivity, coherence time, and the number of logical qubits are also important. Timetag Module (QTM) — developed jointly within QIA with partners such as QuTech and ICFO — which supports photon‑detection time‑tagging and laser control.

Among quantum ventures, it is not uncommon to expand beyond quantum computing into sensing and networking, as seen with companies like Infleqtion and Q‑CTRL. The key question is whether this represents mere diversification or a lateral deployment of common technical assets. For Qblox, the core competency is not quantum computing per se but control technology that drives quantum devices with high precision and low latency and provides real‑time feedback based on measurement results. The QTM’s design, which handles photon detection, time‑tagging, laser control and conditional branching on the same Cluster, maps directly onto node control requirements for quantum networks.

Therefore, SGA2 is better viewed not as Qblox “entering” quantum networks for the first time, but as an extension of a quantum‑system control platform from single QPUs to distributed quantum systems. Going forward, the important question will be whether this network control technology expands beyond QIA R&D into Qblox’s standard products and commercial deployments.

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