The project "QUASAR" explores a promising microarchitecture for the realization of a semiconductor-based quantum processor with high scaling potential, which has no geometric scaling limits and will be realized by means of industrial semiconductor technology. Two-dimensional connectivity is to be achieved by spin-coherent "shuttling" of electrons in gate-defined quantum dot structures. Si/SiGe quantum wells are used as the technological basis and research is carried out into their qubit-relevant properties.

For this purpose, IHP uses its many years of expertise and extensive infrastructure to develop SiGe/Si-based quantum materials which can be directly integrated into today's semiconductor technology. The aim is to understand the fundamental relationships between material defects and qubit properties, which will enable IHP the efficient and systematic development of SiGe/Si substrates suitable for quantum processors. In addition, on the basis of its own 200 mm SiGe BiCMOS technology IHP is developing critical process modules for the realization of a spin-qubit based quantum processor in silicon.


The project is funded by Federal Ministry of Education and Research (BMBF). Funding program: Quantum processors and technologies for quantum computers

Project partners

  • Research Center Jülich GmbH, Peter Grünberg Institute, Jülich / Germany
  • HQS Quantum Simulations GmbH, Karlsruhe / Germany
  • Infineon Technologies Dresden GmbH & Co. KG, Dresden / Germany
  • Fraunhofer Institute for Applied Solid State Physics IAF, Freiburg / Germany
  • Fraunhofer Institute for Photonic Microsystems IPMS, Dresden / Germany
  • University of Konstanz, Mathematics and Natural Sciences Section - Physics Department - Chair Theory of Condensed Matter and Quantum Information, Konstanz / Germany
  • University of Regensburg, Regensburg / Germany

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