The European High Performance Computing Joint Undertaking (EuroHPC JU) has selected six sites across the European Union (EU) to host and operate the first EuroHPC quantum computers: IT4I (Czechia), LRZ (Germany), BSC-CNS (Spain), GENCI-CEA (France), CINECA (Italy), and PSNC (Poland).

Among the expressions of interest received by the EuroHPC JU, those led by Italy, France, Spain and Poland stand out: as indicated, amongst other items, by the use of a common prefix “EuroQCS” in the name of their consortia, they share the will to promote the principles expressed in the Quantum Flagship’s EuroQCS - European Quantum Computing & Simulation Infrastructure - whitepaper. This manifesto aims to encourage the foundation of a federated HPC+Quantum infrastructure and related services:

  • Expose as many complementary Quantum Computing and Quantum Simulation hardware in a Pan-European HPC-QC infrastructure;
  • Foster the integration and hybridization between HPC and Quantum;
  • Shape the ecosystem by creating synergies in the EuroQCS developer community, supporting users and attracting new ones.

More information on the EuroQCS whitepaper can be found here.

The four selected hosting entities did not simply draft a project which demonstrated their ability to accommodate and make a quantum machine operational. Relying on this common EuroQCS vision, they established a joint collaboration around four pillars:

  • Provide access to complementary quantum technologies to European users;
  • Share and reuse ongoing software foundations (such as HPCQS or national initiatives);
  • Work on common use cases;
  • Set up a distributed High Level Support team (HLST).

The EuroQCS initiative relies on a shared vision and the four consortia aim at being joined in this effort by all European HPC-QC stakeholders.

Provide access to complementary quantum technologies

Numerous technological tracks are being explored to build quantum computers. Different physical interpretations of the realization of the qubit in real life have given birth to diverse quantum computers, each with their own weaknesses and strengths, in many cases yet to be discovered. The authors involved in writing the EuroQCS whitepaper know very well that in the near future we will dedicate significant time to discover the potential of the different quantum machines that will be integrated with the supercomputers already present in many European facilities. By mastering many of these quantum technologies and exposing them rapidly to European researchers, Europe has a unique chance to be at the forefront of the hybrid HPC+quantum computing era.

Share and reuse ongoing software foundations

The partners agreed to build on the existing national initiatives and on HPCQS (High Performance Computers Quantum Simulators hybrid) European project, co-funded by EuroHPC and 6 member states. This project aims to deploy first step to a pan European hybrid HPC quantum research infrastructure, starting by coupling two Tier-0 systems (Joliot Curie of GENCI at TGCC/CEA, France and Juwels of JSC at FZJ, Germany) with two 100-qubit analogue quantum simulators. Such infrastructure will be open for free and Open Research purpose to European researchers from academia and industry. HPCQS was designed to be evolutive to more partners and more quantum hardware with the aim to bridge all EuroHPC hosting entities.

Work on common use cases

Another key aspect that will unlock the real value of quantum computing is the ability of the technology to accelerate the resolution of industrial and scientific use cases. Getting closer to a quantum advantage will require a sustained effort to apply quantum computing schemes to the resolution of real-life problems. These use cases will also be a good way for EuroQCS users to compare the respective performances of the different hardware platforms exposed in this share infrastructure. Users might discover that one of these technologies is better suited for a specific application than the others. Amongst the applications where quantum computing is expected to bring a substantial acceleration are the simulation of physical systems, quantum chemistry, the resolution of partial differential equations and quantum Machine Learning.

Set up a distributed High-Level Support Team (HLST)

Getting access to numerous quantum simulation and quantum computing technologies in a hybrid HPC+Quantum environment will require a set of high-level skills in various domains, that all end-users don’t necessarily have. To foster the adoption of these various new devices and frameworks, the four consortia have decided to pool about 20 experts with the required skill set, gathered in a High-Level Support Team (HLST).

Their activities will spread between:

  • Training initiatives, to provide end-users with the keys to work on the different components of the share infrastructure;
  • Support activities, helping users port their work on the different hardware technologies;
  • Dissemination, to attract new users on the platform.

To throw the foundations of the shared EuroQCS infrastructure, the four consortia also rely on their respective partners, on their national efforts on quantum technologies and on the specific use cases they can bring to this initiative.


For Italy, the EuroQCS-Italy project was selected. EuroQCS-Italy is an Italian-led consortium formed by Italy (CINECA, hosting entity), Slovenia (ARNES) and Germany (FZJ). The chosen quantum computer is a "neutral atoms" qubit technology computer, capable of operate both in analog than in digital mode. It will be installed in the Bologna Technopole and it will work in synergy with the EuroHPC "Leonardo" supercomputer. The Italian strategy for the development of quantum computing passes through a close link with the world of HPC. The newborn National Center of HPC, Big Data and Quantum Computing, financied by the Italian government and led by INFN (with the participation, especially at the infrastructural level, of CINECA) aims at the creation of a national network of supercomputers connected to various types of accelerators, including quantum accelerators. The arrival of the EuroHPC quantum computer fits perfectly into the dynamics of the center, providing a significant upgrade for Leonardo's infrastructure and connecting, through the EuroQCS initiative, the Italian unification strategy with the European one. The National Center will also be a place of aggregation and meeting for all Italian researchers, who will therefore be able to access computing resources scattered throughout the country in a simple and effective way.


The EuroQCS-France consortium is led by GENCI as hosting entity and CEA as hosting site, with the University Politehnica of Bucharest (UPB, Romania), Forschungszentrum Jülich (FZJ, Germany) and Irish Centre for High-End Computing (ICHEC, Ireland) as members. The targeted technology will be a photonic quantum computer that will be installed at TGCC and coupled with the Joliot Curie supercomputer just like the 100-qubit Pasqal quantum simulator acquired in the context of the HPCQS project. In the context of the French National Quantum Plan, GENCI and the CEA have been mandated, among other partners, to participate in the France Hybrid HPC Quantum Initiative (HQI), which aims at coupling a HPC system with different flavors of quantum simulators and quantum computers. On top of this infrastructure, HQI also consists in an academic and industrial research program around HPC+Quantum, along with dissemination and end-user support activities. The Pasqal system and the EuroHPC photonic quantum computer will be the first two machines exposed within this HQI platform. EuroQCS-France is also contributing. The ambition is to learn from the integration of these platforms in an HPC+Quantum ecosystem to propose an optional production-class Quantum partition for targeted workloads in the future French Exascale supercomputer. EuroQCS-France also contributes use cases to the EuroQCS joint effort, around various topics such as electromagnetic simulation, structural mechanics, engine combustion, material simulation, meteorology and earth observation.


The EuroQCS-Spain consortium is led by the BSC-CNS as a hosting site, the International Iberian Nanotechnology Laboratory (INL) from Portugal and the Institut de Física de Altes Energies (IFAE) from Spain. The BSC-CNS will integrate its current digital quantum computer based on superconducting circuits with an analog quantum processor procured by the JU, and the pre-exascale supercomputer MareNostrum5. All together will become a highly heterogenic supercomputing infrastructure, with two types of classical processors and two types of quantum processors.

Quantum Spain ( is a collaborative project coordinated by the BSC-CNS that involves 27 institutions across the Spanish territory. It aims to install a digital quantum computer at the BSC-CNS and integrate its access to the Spanish Supercomputing Network (Red Española de Supercomputación). With the EuroHPC analog quantum computer acquisition, the users of this network, together with any European user, will greatly benefit from a highly sophisticated computational infrastructure.


One of the critical areas under the Polish government strategy covers High-Performance Computing & Quantum Computing aspects. Supercomputers are planned to be included in Poland's strategic resources to serve as innovative tools for advanced computing simulations and Big Data analysis. The Polish government will also use them to support AI-based solutions, including support for industrial and transport innovation, energy, space technology, meteorology, or crisis modelling. To meet the ambitious goals in the sphere of digital innovation for science and the information society, it is necessary as a country to create conditions for access to innovative tools and e-infrastructure using no longer just supercomputers but also new powerful quantum computers. The designation of Poland as one of six European locations for hosting a new hybrid classical-quantum supercomputer is in line with Poland's strategic objectives. PSNC, as coordinator of the EuroQCS-Poland consortium, has for many years represented Poland in the PRACE initiative for cooperation in advanced computing in Europe, actively participates in developing the GÉANT pan-European network as NREN and is also involved in the EuroQCI initiative.