Helmut Ritsch is a Professor at Innsbruck University. His research covers the fields of theoretical quantum optics, cavity QED and ultra-cold gas physics with strong connections to quantum information theory, quantum precision measurement and foundations of quantum physics. The central focus is on full quantum descriptions of matter and light waves, which are strongly coupled by energy and momentum exchange. Our aim is an effective theoretical description of real physical systems in a close connection with experiments, where genuine quantum phenomena as quantum phase transitions, entanglement and macroscopic super positions can be studied in a well-controlled and understood environment. Application targets are a new quantum gas based hardware basis for quantum simulations, quantum annealing as well as state of the art implementations and improvements of optical atomic clocks and super radiant lasers.