Freiburg 2019 – wissenschaftliches Programm
FM 27.3: Invited Talk
Dienstag, 24. September 2019, 12:00–12:30, Audi Max
Towards Quantum Communication Networks using Solid-State Quantum-Light Sources — •Tobias Heindel — Institute of Solid-State Physics, 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 proof-of-concept quantum key distribution (QKD) experiments  and discuss the development of state-of-the-art components for QKD, such as plug-and-play single-photon sources and receiver modules. In this framework, we show how to optimize the performance of QKD implementations and demonstrate real-time security monitoring for QKD with sub-poissonian light sources . Assembling these building blocks to build functional multi-user quantum-secured communication networks will be a grand challenge in photonic quantum technologies, which is tackled within my recently founded Junior Research Group at Technische Universität Berlin.
 T. Heindel et al., New J. Phys. 14, 083001 (2012)
 T. Kupko et al., in preparation (2019)