Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 20: QuanTour II – Multi-photon Effects & Entanglement
Q 20.6: Talk
Tuesday, March 3, 2026, 12:30–12:45, P 7
Entanglement generation through multi-photon interference with deterministic single photons in the telecom C-Band — •Nico Hauser1, Matthias Bayerbach1, Jochen Kaupp2, Yorick Reum2, Giora Peniakov2, Johannes Michl2, Martin Kamp2, Tobias Huber-Loyola2, Andreas T. Pfenning2, Sven Höfling2, and Stefanie Barz2 — 1Universität Stuttgart, 70569 Stuttgart, Germany — 2Julius-Maximilians-Universität, 97074 Würzburg, Germany
Multi-photon interference of highly indistinguishable single photons in the telecom C-band is a critical requirement for many quantum communication and quantum computation protocols. While quantum dot-based single-photon sources have been demonstrated to be a prime candidate for deterministic single-photon generation in the telecom C-band, the generation of entangled multi-photon states from C-band quantum dots remains an active area of research. Here, we present multi-photon interference experiments using symmetric N-port beam splitters for multi-partite entanglement generation. We combine a quantum dot emitting in the telecom C-band with an active demultiplexing scheme to deterministically separate consecutively emitted single photons and show the generation of genuine multi-photon entangled states using compact, fiber-based multiport interferometers.
Keywords: Quantum Dot; Telecom; Quantum Optics; Multi-photon interference