We are thrilled to share an important milestone for quantum research at T-Labs! Our Berlin-based Quantum Research Lab, in collaboration with Qunnect, has achieved a new record for entanglement distribution over commercial fiber: - 30 kilometers of active, field-deployed telco fiber - 17 days of uninterrupted quantum entanglement - 99% fidelity This experiment marks a crucial step toward enabling the quantum internet. It shows that high-fidelity polarization qubits (essential for quantum computing and sensing) can run in parallel with classical data traffic on a telco-grade fiber network. The field trial is a proof point of what’s possible when deep research meets real infrastructure. It was presented at OFC 2025 by Deutsche Telekom's R&D Architect Matheus Sena, where we reinforced the belief that future networks will be shaped by quantum physics and built through collaboration. T-Labs’ quantum research strategy focuses on long-term partnerships with academia and industry to explore secure communications and efficient network architectures powered by quantum technologies. We look forward to what the future holds! #QuantumResearch #QuantumInternet #Telco
Huge respect to the teams at T-Labs and Qunnect. This is a major step forward. 30km entanglement over telco fiber isn’t just a quantum communications milestone — it’s a signal that the infrastructure for scalable quantum systems is being laid now. This kind of fidelity in the wild brings new meaning to the phrase: “The field is ready.”
Dear Matheus, dear team, Thanks a lot for your efforts & passion.. and what an incredible journey we took so far, and I this is just the beginning. The quantum tech will gain much more relevance soon.
Congratulations, can‘t wait to see where the future takes us with this incredible technology!
Great!
So glad to have opportunity to work with the guys from Quantum team at our T-Labs
Data Engineer - GCP @T-systems (Deutsche Telecom)
2dAbsolutely fascinating work! This is a huge leap for scalable quantum networks. Reading this sparked a few questions that I'd love to learn more about, if you're open to sharing: 1. What physical or environmental factors contributed to the remarkable 17-day uptime? 2. How does entanglement behave across multiple hops or quantum repeaters in this setup? 3. Is it possible to dynamically route entangled photon pairs similar to classical packet switching? Thanks again for sharing this breakthrough - looking forward to seeing what's next in this space!