Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 27: Special Session: Quantum Networks

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 [1] 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 [2]. 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.

[1] T. Heindel et al., New J. Phys. 14, 083001 (2012)
[2] T. Kupko et al., in preparation (2019)