B3: Superconducting Devices for Quantum Information Processing and Metrology

This project has been devoted to the development of superconducting circuits for quantum information processing. This timely and highly competitive field requires a combination of several state-of-the-art technologies, including nano-scale structuring of metal (Al or Nb) islands and junctions, low-temperature facilities (down to the 10 mK range), high-frequency control and read-out (in the range of 1 to 10 GHz), and filtering for an ultra low-noise environment. The experimental progress in this field goes together with theoretical activities, ranging from the study of fundamental questions of quantum information processing to down-to-earth issues, such as the analysis of noise and of coupling schemes. With the recruitment of Alexey Ustinov the activities and collaborations within this project have stepped up substantially and will be expanded by proposed new subprojects in the new funding period.