Quantum computing: Infineon contributes to Quasar and Qlsi projects

Infineon contributes to the funded projects GEQCOS for superconducting qubits, PIEMONS for quantum computing based on ion traps, and to the Quasar project, which focuses on silicon-based spin qubits

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Infineon is one of the pioneers in the field of quantum computing technology. Quantum computing and its broader application are still in their infancy and the value creation potential of the application of quantum computing is enormous.

Scientists in this field are pursuing three avenues for the technical and physical implementation of qubits (quantum bits, ed.) - superconducting qubits, ion trap-based qubits and silicon-based spin qubits - and Infineon is active in all three approaches.

In fact, the company contributes to the funded projects GEQCOS for superconducting qubits, PIEMONS for ion trap-based quantum computing and the Quasar project, which focuses on silicon-based spin qubits. This project is funded by the German Federal Ministry of Education and Research (BMBF) as part of the funding program "Quantum technologies - from basic research to market".

"A key advantage is that silicon-based spin qubits are robust, fast and at the same time have excellent scaling potential," says Claus Dahl, Director Automotive Sense and Control at Infineon Dresden.

The aim of the Quasar project is to develop a semiconductor quantum processor based on electron exchange ("shuttle") and to be realized with technology available in Germany. In addition to Infineon, scientists from the Forschungszentrum Jülich, the Fraunhofer-Gesellschaft and the Leibniz Association, the Universities of Regensburg and Constance, and the quantum start-up HQS are working on the project.

In silicon-based qubits, quantum information is encoded by the spin of electrons. These electrons are located in so-called quantum dots, special semiconductor structures in the nanometer range. New interconnecting elements, quantum buses, are to be used for the interaction between qubits, which will allow electrons to be transported in a controlled manner over distances of up to about 10 micrometers, without losing quantum information.

The Qlsi project

Infineon Dresden is also participating in the Quantum Large-Scale Integration with Silicon (QLSI) project of the European Quantum Flagship, which started in September 2020. Together with partners from the Quasar project and other European institutions, Infineon is researching a compatible fabrication approach for semiconductor qubits. The QLSI project is coordinated by the French research institute for electronics and information technology CEA-Leti.

"In close cooperation with academic research, we want to raise the quality in quantum device fabrication to an industry-compatible level in these projects. After all, only by using the industry-standard processes of CMOS technology to a large extent can the challenges in process integration be overcome," says Dahl again.

"If we in Germany and Europe do not want to depend exclusively on American or Asian know-how for this future technology, we must move forward with industrialization now," says Sebastian Luber, Senior Director Technology & Innovation at Infineon. Infineon's research projects play an important role in laying the foundation for the implementation of the current federal initiative to build a quantum computer "made in Germany".


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