Regensburg 2019 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 26: Focus Session: Quantum light sources for applications in quantum communication networks

HL 26.5: Invited Talk

Wednesday, April 3, 2019, 11:15–11:45, H34

Towards Quantum Communication Networks Exploiting Solid-State Quantum-Light Sources — •Tobias Heindel — Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany

Tremendous progress has been achieved in the engineering of solid-state-based non-classical light sources during the last two decades. In this context, quantum-light sources based on semiconductor quantum dots (QDs) are of particular interest. Allowing for the generation of close-to-ideal flying qubits these devices are predestinated for implementations of quantum communication.

In my talk, I will review our progress in this field, striving towards the ultimate goal of a global secure communication. I will revisit first proof-of-concept QKD experiments and discuss the development of state-of-the-art components for quantum key distribution (QKD), such as plug-and-play single-photon sources and receiver modules. In this context, the metrology of the quantum light sources together with a thorough security analysis of the measurement devices are essential for implementations of QKD. Assembling these building blocks to finally realize functional multi-user quantum-secured communication networks will be a grand challenge in quantum technologies, which is tackled within my recently founded Junior Research Group at Technische Universität Berlin.