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Q: Fachverband Quantenoptik und Photonik

Q 24: Quantum Effects

Q 24.4: Poster

Tuesday, March 15, 2022, 16:30–18:30, P

Integrating a fiber cavity along the axis of a linear ion trap — •Viktor Messerer¹, Markus Teller¹, Klemens Schüppert¹, Roberts Berkis¹, Pritom Paul¹, Dario A. Fioretto¹, Maria Galli¹, Yueyang Zou¹, Jakob Reichel², and Tracy E. Northup¹ — ¹Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria — ²Laboratoire Kastler Brossel, ENS-Université PSL, CNRS, Sorbonne Université, Collège de France, 24 rue Lhomond, 75005 Paris, France

Quantum networks allow for distributed quantum computation, inherently secure communication as well as enhanced quantum sensing. The nodes of a quantum network consist of multiple controllable stationary qubits and an interface to traveling qubits to interconnect distant network nodes. Trapped ions, coupled to an optical resonator mode allows for an efficient and deterministic ion-photon interface.

Recent experiments with a single trapped ion coupled to a fiber-based optical resonator have demonstrated a coherent coupling rate exceeding the atomic spontaneous-emission rate. This coherent ion-photon interaction is expected to enhance the fidelity and efficiency of quantum communication protocols.

We designed and constructed a system for strong coupling of multiple ions to a fiber cavity. The fiber mirrors are integrated along the axis of a linear Paul trap. Ions can be positioned along this axis without introducing excess micromotion. We will present the apparatus, measurements of the ion trap heating rate and micromotion, as well as first experimental results of coupling an ion to the cavity.