On the Way to the first usable Quantum Networks

For years, researchers worldwide have been working on the development of Quantum Networks. In recent years, the focus has shifted from individual links to systems capable of distributing Quantum Entanglement reliably, with useful transmission rates, and over long distances. An interview with Prof. Dr. Ronald Hanson on the current state of Quantum Network Development and the challenges on the path toward practical applications was published in the June issue of Optics & Photonics News and is available through the publication’s paid subscription service. Hanson is a professor at Delft University of Technology (TU Delft) and co-founder of Delft Networks, a company developing hardware and software for Quantum Networks with the aim of distributing entanglement over long distances. In the interview, he provides insights into current challenges and developments in this field and discusses what progress can be expected in the coming years.

A key challenge towards usable Quantum Networks is the reliable distribution and storage of Quantum Entanglement over large distances. This requires different technological components – from the generation and transmission of Quantum States to the integration of suitable storage and network elements – to work together efficiently. Ronald Hanson emphasizes the importance of scalable technologies and advances in photonic integration. In his view, Quantum Repeaters will also play an important long-term role in extending the reach of future Quantum Networks. However, initial practical applications could emerge before fully developed Quantum Repeaters become available. According to Hanson, urban Quantum Networks in particular could represent an important step towards more powerful Quantum Communication Systems. Click here for the interview.

Source reference: https://www.optica-opn.org/home/articles/volume_37/june_2026/departments/building_the_first_useful_quantum_networks/