The research group led by Rainer Blatt investigates quantum processes in a system of few ions held in ion traps. The experiments aim at achieving complete control over all quantum degrees of freedom in order to store and process quantum information in a system of trapped ions. Here, the focus is on quantum simulation and infor-mation. A second related topic is precision spectroscopy and quantum metrology with the goal of constructing a quantum-logic based single-ion optical clock.