Flux pumps are devices able to energise superconducting magnets with no conductor crossing the cryostat wall: a time-varying field and a region of controllable resistance drive DC into a closed loop.After a brief account of how flux pumps developed, a review of the mechanisms available in HTS and the resulting taxonomy are presented: rotating and linear travelling-wave flux pumps,...
Rare-earth borides provide a particularly interesting platform for investigating superconductivity in the presence of magnetic order. The coexistence and competition of these two collective states may lead to behavior that goes beyond the conventional spin-singlet BCS scenario and, under appropriate conditions, may favor unconventional pairing mechanisms. Such systems are of fundamental...
Photodetector is an essential instrument in quantum optics and is extensively used for various applications across the diverse domain of quantum technologies. A Josephson photomultiplier (JPM) is an on-chip microwave detector that is fully compatible with superconducting circuit QED architecture. Essentially, it is a phase qubit that operates as an absorbing single-photon threshold detector,...
An overview of the FREIA LAboratory, with its infrastructure and past and current projects.
