Status of the Quantum Key Distribution Testbeds in Thuringia, Germany and Europe.

Quantum Key Distribution (QKD) currently represents one of the most promising technologies
for securing communication networks against future threats posed by quantum computing.
Thuringia plays a pivotal role in this research domain, particularly through the establishment and
operation of practical QKD testbeds. This presentation provides an overview of existing testbeds
and ongoing research activities in quantum communication within Thuringia, highlighting the
challenges and successes associated with integrating QKD into real-world communication
infrastructures connecting Nordhausen, Erfurt, and Jena.
Furthermore, the integration of Thuringian activities into national and European initiatives such
as QuNET, Q-net-Q, and EuroQCI is analyzed and discussed critically. The aim of the
presentation is to illustrate the significance of these testbeds for the industrial adoption of QKD
in Germany and Europe, including specific use cases. Both technological and organizational
challenges encountered in developing robust, quantum-secured infrastructures are discussed.
Finally, the presentation concludes with an outlook on future developments and essential
measures necessary to establish a Europe-wide quantum communication infrastructure,
ultimately ensuring the long-term digital sovereignty of Germany and Europe.

Presentation language: ENG