On 18 September 2025, QPIC1550 technology was displayed outside the laboratory for the first time during the Navigating the Quantum Terrain workshop, hosted by the Royal Danish Academy of Sciences and Letters. The one‑day event, jointly organised by DTU and the University of Copenhagen, brought together researchers and industry representatives investing in quantum technologies to explore emerging directions in quantum science.
A team of researchers from the QCSys (Quantum Communication System) and Quantum Light Sources groups at DTU Electro—led by Assistant Professor Caterina Vigliar and Senior Researcher Mujtaba Zahidy—presented the first QPIC1550 demonstrator operating within a real‑time quantum experiment.
The QPIC1550 chip generates multiple pairs of entangled photons through spontaneous four‑wave‑mixing spiral sources and performs arbitrary rotations using complex Mach–Zehnder interferometric structures and single‑photon detection. These capabilities enable the encoding of up to four qubits and the execution of a wide range of quantum operations on‑chip.
This demonstration marks the first successful use of Ligentec’s SiN platform, enhanced with Tyndall’s advanced packaging techniques, for quantum computing applications—an important step toward future chip‑to‑chip distributed computing architectures.
The event offered a concrete preview of the project’s technological outcomes and highlighted the growing momentum behind integrated quantum photonics in Europe.
