Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum Communication, Networks, Repeaters, & QKD I

Q 49.3: Vortrag

Donnerstag, 5. März 2026, 11:30–11:45, P 10

Exploring the nuclear spin environment of individual erbium emitters — Alexander Ulanowski, Olivier Kuijpers, Benjamin Merkel, Adrian Holzäpfel, •Noah Weinhold, and Andreas Reiserer — Technical University of Munich, TUM School of Natural Sciences, Physics Department and Munich Center for Quantum Science and Technology (MCQST), 85748 Garching, Germany

Nuclear spins in solids exhibit exceptional coherence times and present promising candidates for nuclear spin registers and robust quantum memories. In this work, we focus on the nuclear spin of ¹⁶⁷Er dopants, which feature an optical transition within the low-loss wavelength window of optical fibers. Using a high-finesse cryogenic Fabry-Perot cavity, we achieve all-optical control and readout of ¹⁶⁷Er dopants in a 10 µm thin yttrium orthosilicate crystal. We further implemented spectroscopy techniques to characterize the superhyperfine interaction with Y nuclear spins surrounding individual Er dopants [1]. This may be used as a resource in quantum technology e.g. enabling the entanglement of nuclear spins with emitted photons or targeting nearby nuclear spins for quantum memories.

[1] A. Ulanowski, O. Kuijpers, B. Merkel, A.Holzäpfel, and A. Reiserer, PRX Quantum 6, 020344 (2025)

Keywords: Quantum networks; Rare-earth; All optical