Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quantum Communication II
Q 12.8: Talk
Monday, March 11, 2024, 18:45–19:00, HS 3118
Addressing single nuclear spins at telecommunication wavelength — Alexander Ulanowski1, •Adrian Holzäpfel2, Olivier Kuijpers2, and Andreas Reiserer1,2 — 1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany — 2TU München and Munich Center for Quantum Science and Technology, 85748 Garching, Germany
Single emitters in solids are a particularly promising building block for large-scale quantum networks because their integration in micro- and nanodevices offers great potential for scalability. Previously, our group has demonstrated the coherent manipulation and efficient optical interfacing of individual erbium emitters in a micrometer-thin yttrium orthosilicate membrane by integrating it into a high finesse Fabry-Perot resonator [1]. In recent devices, we achieve a Purcell enhancement of their optical transition in the telecom C-band of up to 110. The coherence of our system could be greatly increased by encoding the information stored onto long-lived nuclear spins. We investigate two different approaches. First, we consider the superhyperfine interaction of a single erbium electron spin with the nuclear spin of neighboring yttrium ions. In a second approach, we study the 7/2 nuclear spin of the isotope Er167, opening a promising path to quantum repeater nodes with second-long coherence.
[1] A. Ulanowski, B. Merkel & A. Reiserer, Sci. Adv. 8, (2022).
Keywords: rare earth ions; single emitters; optically addressable spins