I am interested in how the fundamental laws of quantum mechanics can be turned into working principles for future information technologies, and, at the same time, I am fascinated by the implications of information theory for the foundations of physics. The interplay between applications and foundations has led me to study quantum causal networks, quantum clocks and gyroscopes, quantum learning machines, and quantum computations with an indefinite causal order. On the fundamental side, I am engaged in a research program searching for a new understanding of quantum physics based on information theory.