Quantum information processing with modular quantum processors

by Dr Johannes Knörzer (ETHZ)

Wednesday 27 May 2026, 10:00 → 11:00 Europe/Zurich

ODRA/111

Distributed quantum information processing seeks to overcome the scalability limitations of monolithic quantum devices by interconnecting multiple quantum processing nodes via classical and quantum communication. This approach extends the capabilities of individual devices, enabling access to larger problem instances and novel algorithmic techniques. Beyond increasing qubit counts, it also enables qualitatively new capabilities, such as joint measurements on multiple copies of high-dimensional quantum states. The distinction between single-copy and multi-copy access reveals important differences in task complexity and helps identify which computational problems stand to benefit from distributed quantum resources. At the same time, it highlights trade-offs between classical and quantum communication models and the practical challenges involved in realizing them experimentally. In this talk, I will give an overview of recent work on selected multi-copy protocols and experimental progress in modular quantum computing with superconducting quantum hardware.