Many everyday technologies are based on the principles of quantum physics: lasers, transistors, satellite positioning systems (GPS), etc. Over the past few years, quantum technologies in the broad sense have been the focus of marked interest from both businesses and governments, in parallel to technical breakthroughs. New quantum technologies concern applications such as sensors, calculation or communications. These fields rely on the principles of quantum physics, particularly entanglement and state superposition. In Europe, a major “flagship” programme was launched in 2018 to support European projects in the global quantum technology race, the main countries in the running being China and the United States.