Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: Quantum Networks, Repeaters, and QKD I (joint session Q/QI)
Q 2.6: Vortrag
Montag, 10. März 2025, 12:30–12:45, AP-HS
Cavity-enhanced Diamond Color Centers as Quantum Network Nodes — •Yanik Herrmann1, Julius Fischer1, Stijn Scheijen1, Cornelis F. J. Wolfs1, Julia M. Brevoord1, Colin Sauerzapf1, Leonardo G. C. Wienhoven1, Laurens J. Feije1, Matteo Pasini1, Martin Eschen1,2, Maximilian Ruf1, Matthew J. Weaver1, and Ronald Hanson1 — 1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands — 2Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, The Netherlands
In the realization of quantum networks, efficient interfaces between stationary qubits and optical photons are a key requirement. Diamond color centers are on the forefront of solid state qubits due to their long spin coherence and spin register capabilities in combination with spin-state selective optical transitions. To boost the efficiency of the spin-photon interface, open microcavities can be utilized to Purcell-enhance optical transitions of the color centers. We realized a fiber-based microcavity setup at low-temperature with a high passive stability and microwave integration. This setup is used to Purcell-enhance single Tin-Vacancy centers, demonstrating quantum non-linear effects in the coherent coupling regime. Furthermore, we will present our latest results on implementing a cavity-enhanced quantum network node based on Nitrogen-Vacancy centers.
Keywords: Diamond; Microcavity; Purcell Effect; Fibercavity; Quantum Networks