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QI: Fachverband Quanteninformation
QI 37: Poster – Quantum Information Technologies (joint session Q/QI)
QI 37.9: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Setup of a rack-mounted ion trap with integrated cavity — •Lara Becker1, Jolan Costard1, Stephan Kucera1,2, and Jürgen Eschner1 — 1Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken — 2Luxembourg Institute of Science and Technology, Belveaux, Luxembourg
For the realization of quantum networks, quantum repeaters [1] overcome the distance limitations due to propagation loss in direct transmission. Interfaces between single trapped ions and single photons [2] are promising building blocks for implementing a quantum repeater.
We are setting up a multi-segment Paul trap for 40Ca+ ions with an integrated fiber cavity to increase the photon collection and generation efficiency of the interface. The trap consists of two laser-machined and metal-coated ceramic ferrules, into which the fiber cavity with sub-mm spacing is integrated. With its compact design, the trap-cavity system including the vacuum chamber, control electronics, ablation laser and photo-ionization laser will be stored in a single transportable rack. Its future implementation will enable quantum repeater protocols [3] over the Saarbrücken fiber link [4].
[1] H.-J. Briegel, et al., Phys. Rev. Lett. 81, 5932 (1998)
[2] M. Bock et al., Nat. Commun. 9, 1998 (2018)
[3] M. Bergerhoff, et al., Phys. Rev. A 110, 032603 (2024)
[4] S. Kucera, et al., npj Quantum Inf. 10, 88 (2024)
Keywords: Cavity ion trap; Trapped ion; Fiber cavity; Quantum repeater cell