Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 66: Poster – Quantum Technologies III
Q 66.16: Poster
Thursday, March 5, 2026, 17:00–19:00, Philo 2. OG
Design and implementation of a multi-segment Paul trap — •Franz Krieger1, Lara Becker1, Stephan Kucera1,2, Jan C. Müller3, and Jürgen Eschner1 — 1Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken, Germany — 2Luxembourg Institute of Science and Technology, 4362 Belvaux, Luxembourg — 3Johannes Gutenberg Universität Mainz, 55122 Mainz, Germany
Single trapped ions as quantum memories and single photons as quantum information carriers are promising building blocks for quantum networks, enabling high-fidelity entanglement through controlled single-photon absorption and
emission [1]. Ion-photon interfaces are thus well-suited for quantum repeaters [2] and linking quantum processors into quantum computing networks. We are developing a multi-segment linear Paul trap for 40Ca+ ions,
fabricated from glass with a segmented metal-coated electrode structure. This design addresses pitfalls encountered in the previous segmented ferrule trap [3],
offering improved mechanical stability, and more flexible fabrication. The new setup also allows integration of a fiber cavity for efficient photon collection and generation. In the first prototype, the trap is implemented without the cavity. The compact design enables the entire system, including the vacuum chamber, control electronics, and ablation and photo-ionization lasers, to fit within a single transportable rack.
[1] E. Arenskötter et al., npj Quantum Inf. 9, 34 (2023).
[2] M. Bergerhoff et al., Phys. Rev. A 110, 032603 (2024).
[3] L. Becker et al., poster Q 62.9, DPG Spring Meeting, Bonn (2025).
Keywords: Cavity ion trap; Trapped ion; Fiber cavity; Quantum repeater cell