Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.35: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Fobau Physik

Integrating a fiber cavity along the axis of a linear ion trap — •Viktor Messerer¹, Markus Teller¹, Klemens Schüppert¹, Dario A. Fioretto¹, Konstantin Friebe¹, Maria Galli¹, Yunfei Pu¹, Yueyang Zou¹, Jakob Reichel², Rainer Blatt^1,3, and Tracy E. Northup¹ — ¹Institute of Experimental Physics, University Innsbruck, Austria — ²Laboratoire Kastler Brossel ENS / UPMC-Paris 6 / CNRS, Paris, France — ³Institute of Quantum Optics and Quantum Information, Innsbruck

Interfaces between stationary and traveling qubits are fundamental building blocks for quantum networks. Cavities are an established approach for an efficient interface; here, we use a fiber cavity to couple trapped ions to photons. Fiber cavities allow access to the strong coupling regime, due to their small effective mode volume, allowing quantum communication to be carried out over long distances with high fidelity and efficiency. Our design requirements for this fiber-based ion-cavity interface include the ability to trap ion crystals, to compensate for surface charges on the dielectric cavity mirrors, and to align the fiber cavity with respect to the ion. To address these challenges, we have designed and constructed an ion-cavity system in which the mirrors of a fiber cavity are integrated in the electrodes of a linear Paul trap. We have simulated the trap potential for various configurations of surface charges, trap voltages and electrode positions in order to confirm that our requirements are met. We are currently testing and characterizing the trap in the absence of the fiber cavity. Furthermore, we will report on parallel work on the assembly of the fiber cavity.