Ultracold atoms have in the past two decades become one of the most active and exciting research areas in physics. Cold atomic systems are low energy, pure and highly configurable and therefore allow to create setups in which new and advanced quantum mechanical effects can be studied and engineered. In fact, cold atomic systems are not only at the forefront for discovering fundamental new physics, they are also at the frontier in the development of advanced quantum technologies, such as quantum simulators or quantum metrology devices.