“Quantum Optics and Gravitational Physics” is one of four research focus areas at Leibniz Universität Hannover (LUH). This thematic orientation is the result of a renowned competence in laser technology, quantum optics and gravitational physics. The DFG ‘Funding Atlas’ 2018 (Förderatlas) ranks the Leibniz Universität Hannover as number one in the fields Quantum Optics and Atomic, Molecular, Optical, and Plasma Physics for obtaining third-party funding. The research focus on Quantum Optics and Gravitational Physics and the commitment of Leibniz Universität Hannover to the topics, provides a sustainable and attractive environment for top scientists in the field. In fact, two new research buildings, with internationally unique large-scale experimental equipment, were commissioned in the recent years on the LUH Campus; namely, the Laboratory of Nano and Quantum Engineering LNQE (LUH) and the Hannover Institute of Technology (HITec). The LUH research profile supports close, synergistic partnerships with the local Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) in Hannover, including the British-German Gravitational Wave Detector GEO600 (near Hannover) as well as the Laser Zentrum Hannover (LZH).