Open Superconducting Quantum Computers

The OpenSuperQPlus Framework Partnership Agreement (FPA) has created a roadmap for developing a full-stack superconducting quantum computing system during 2023-2029, as well as a roadmap that also looks forward beyond 2030. OpenSuperQPlus is divided into two project phases, with the goal of delivering a 1,000 qubit quantum computer based on European technology. In the first phase, OpenSuperQPlus100, the target is to deliver full-stack quantum computer demonstrators, one of which will contain at least 100 high-quality qubits. A major focal point will be to increase the number of entangled qubits towards 50, which is near the point where the simulation capacity of classical supercomputers is exceeded. OpenSuperQplus100 delivers the necessary components to achieve that goal.

Software is an integral part of the project. The collaboration within OpenSuperQPlus100 will deliver an enabling software stack that allows for remote cloud access and access through HPC centers, in a unified HPC+QC setting. In addition, a software library of relevant algorithms and use cases will be provided. This is completed by a test and benchmarking suite, exploring the potential realization of beyond-classical performance in real-world applications.

The agenda of OpenSuperQPlus100 is looking ahead in developing, testing, and down-selecting technologies that are needed to reach a 1,000 qubit quantum computing system in the second phase of the FPA. The project also contains structured activities in standardization, education, and ethics. This will inform larger European discussions, spread knowledge, and create a European-wide quantum ecosystem.

The OpenSuperQPlus100 consortium consists of 28 partners from 10 countries, including research and technology organizations, universities, and leading European quantum technology companies. In the effort on efficient integration of quantum computing resources into practically useful hybrid quantum/classical HPC workflows, CSC leads the task on unifying cloud access to the various quantum computer systems within the project. This draws on synergies from several existing programmes for setting up user-friendly access portals throughout Europe. Also, together with IQM Quantum Computers, CSC will extend the capability of the Elmer finite element code to enable highly parallel and efficient quantum processing unit (QPU) circuit design and simulation. The focus will be on extending the modeling tool to enable running unprecedentedly large, computationally demanding jobs on HPC infrastructure.