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MON: Monday Contributed Sessions

MON 13: QIP Implementations: Photons II

MON 13.3: Vortrag

Montag, 8. September 2025, 17:00–17:15, ZHG001

Applications of boosted Bell-state measurements — Matthias J. Bayerbach^{1, 2}, •Simone E. D'Aurelio^{1, 2}, and Stefanie Barz^{1, 2} — ¹Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Stuttgart, Germany. — ²Center for Integrated Quantum Science and Technology (IQST), University of Stuttgart, Stuttgart, Germany

Bell-state measurements are a key component to realize in many quantum communication and computing applications. They are at the heart of quantum repeaters or measurement-device-independent quantum key distribution protocols and essential in the generation of larger entangled state in measurement-based quantum computing. Linear optical implementations are favourable due to their simplicity, but limited in their success rates. Boosting the success rate of these measurements with ancillary photons allow one to overcome this flaw, while keeping the advantages of linear optics.

In this talk, we present experimental implementations of such a scheme. We demonstrate boosted quantum teleportation and boosted entanglement swapping, both critical components of a quantum repeater. Using single photon sources at 1550 nm, our system is compatible with existing telecommunication infrastructure. Our work demonstrated the practicality and usefulness of ancillary state boosting for any application relying on Bell-state measurements.

Keywords: Boosted Bell-state measurements; Quantum Communication; Photonic Quantum Computing