The generation of squeezed states of light and the application in quantum metrology, measurement induced entanglement and high-precision spectroscopy.

Experimental and theoretical studies of the interaction of vortex light with single trapped ions, atomic ensembles and complex chiral media.

Investigation of techniques (theory and experiment) to avoid limiting measurement back-action in precision metrology, e.g. quantum-optomechanics.

The development of novel micro-optomechanical mirrors and their application in high-precision optical metrology and novel light sources.

Development of structured light illumination platforms using arrays of nano-/µLEDs or lasers and their system integration.

The realization of single-photon sources with diverse materials and the applications quantum radiometry, quantum metrology and quantum communication.

This TG works on the design and stabilization of high-power laser systems for next generation Gravitational Wave Detectors.

Understanding transport, dynamics and spin physics in many-body quantum systems from solid-state devices to cold atoms, molecules and trapped ions.

Concepts for the generation, manipulation and applications of squeezed and entangled atomic ensembles.

Understanding fundamental aspects of quantum many-body systems coupled to an external environment and developing quantum technological applications.

Investigations of topological concepts in condensed matter systems. Creation, detection and manipulation of topologically protected excitations.

The TG aims at developing novel and improved quantum electrical standards for electrical current, electrical resistance, and voltage.