The research of our group focused on the theory and applications of engineered quantum systems, i.e., artificial mesoscopic systems whose dynamics are governed by the laws of quantum mechanics. Prominent examples of such mesoscopic systems are superconducting circuits, electro/optomechanical systems, and ultracold trapped atoms and ions.

In addition to the study of fundamental aspects of these so-called quantum machines, the group explored their `real-world' application for high-precision measurements, quantum-limited information processing, and quantum computation. Some of research focuses were on nonreciprocity as a resource for quantum information processing, and the development of novel theoretical concepts for quantum-limited amplifiers for quantum information processing with superconducting circuits.