Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 69: Post-Deadline Session

Q 69.2: Talk

Friday, March 9, 2018, 10:45–11:00, K 1.020

Towards spin-photon entanglement in single ions trapped in UV fiber cavities — Pascal Kobel, Kilian Kluge, •Jonas Schmitz, Maximilian Zawierucha, Hendrik M. Meyer, and Michael Köhl — Physikalisches Institut, Universität Bonn, Wegelerstraße 8, D-53115 Bonn, Germany

Trapped ions coupled to optical cavities are among the most promising candidates for entanglement generation and distribution in quantum networks. We demonstrate single photon generation of a trapped ytterbium ion coupled to an optical fiber cavity as well as coherent qubit control. This paves the way for spin-photon entanglement generation at scalable rates.

Additionally, the setup of a novel dual-species ion trap will be presented. It incorporates macroscopic cavity mirrors designed for transitions at 370 nm (Yb⁺) and 493 nm (Ba⁺). Avoiding macroscopic amounts of hydrocarbons inside the vacuum chamber, the cavity finesse shows no degradation on a timescale of months, contrary to earlier experiments employing UV cavities.