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Q: Fachverband Quantenoptik und Photonik

Q 60: Quantum Communication, Networks, Repeaters, & QKD II

Q 60.1: Hauptvortrag

Donnerstag, 5. März 2026, 14:30–15:00, P 10

Towards entangling distributed registers of atoms — •Ben Lanyon — Institut für Experimentalphysik, Universität Innsbruck, Technikerstasse 25, 6020 Innsbruck, Austria

We are developing methods to entangle remote registers of atoms over distances ranging from a few meters to hundreds of kilometers or more. Such distributed atomic quantum networks could enable new applications in sensing, timekeeping, computing, and communication, and are being pursued worldwide using a variety of approaches. Our approach employs network nodes that each consist of a register of electrically trapped atomic ions (calcium), integrated with an optical cavity for efficient atom-photon interaction, and a separate nonlinear optical process to convert ion emitted photons to telecom wavelengths. Full deterministic quantum logic is available on qubits encoded within the atomic register, allowing each node to function as a small-scale, photon interfaced quantum processor. In this talk, I will summarise one or two of our recently published results --- including a photon interfaced ten qubit register of trapped ions [1] --- or alternatively present some unpublished work, depending on progress in the months before the conference.

[1] M. Canteri et al., Photon interfaced ten qubit register of trapped ions, Phys. Rev. Lett. 135, 080801 (2025).

Keywords: trapped ions; cavity; photon; entanglement