In our laboratory, we mix low-intensity optical and microwave radiation using the quantum resonances of rubidium atoms.
Light sources and detection methods working in the quantum regime are elementary building blocks of quantum information systems.
Satellite links are going to play a key role in future quantum internet, because large distances can be handled by free-space connections.
We develop telecom wavelength compatible solid-state quantum bit systems and study their properties needed for quantum information storage.
Based on our experience with QKD devices, we analyze problems related to building and operating point-to-point long distance quantum communication.