Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.9: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Rare earth ion materials in micro-cavities as optically addressable qubits for quantum information — •Jannis Hessenauer1, Christina Ioannou1, Kumar Senthil Kuppusamy1, Mario Ruben1, Diana Serrano2, Philippe Goldner2, and David Hunger11Karlsruher Institut für Technologie, Karlsruhe, Germany — 2Université PSL, Chimie ParisTech, CNRS, Paris, France

Rare earth ions retain long optical and spin coherence times in solid state hosts and are therefore a promising realization of optically addressable spin qubits. Due to the dipole forbidden nature of the optical transitions, an efficient spin-photon interface for quantum information technology requires the coupling of single ions to an optical cavity to enhance the transitions via the Purcell effect. Recently, rare earth ions in molecular crystals have demonstrated outstanding coherence properties, while also promising a large parameter space for optimization by chemically engineering of the host molecule. We characterize the optical properties of molecular materials at low temperature using techniques such as photoluminescence spectroscopy, absorption spectroscopy and spectral hole burning. Furthermore, we present our progress towards integrating Yb3+-doped materials into stable high finesse fiber-based Fabry-Pérot cavities.

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