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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.61: Poster
Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG
Magnetic Field Dependent Spectroscopic Investigation of a 13C Nuclear Spin Strongly Coupled to a SnV Center — •Mohamed Elshorbagy1, Jeremias Resch1, Ioannis Karapatzakis1, Philipp Fuchs2, Marcel Schrodin1, Michael Kieschnick3, Julia Heupel4, Luis Kussi1, Christoph Sürgers1, Cyril Popov4, Jan Meijer3, Christoph Becher2, Wolfgang Wernsdorfer1, and David Hunger1 — 1Karlsruher Institut für Technologie — 2Universität des Saarlands — 3Universität Leipzig — 4Universität Kassel
The implementation of quantum network protocols relies on entanglement swapping, where a communication qubit acquires a quantum state via a photonic link and subsequently transfers it to a memory qubit. This enables sequential state reception and two-qubit gate operations. Group-IV color centers in diamond, such as tin-vacancy (SnV) centers, coupled to nearby 13C nuclear spins, are promising candidates for such applications. Their strong hyperfine interaction allows for efficient microwave control of the nuclear spin state. However, the trade-off between electron spin lifetime, Rabi frequency, and electro-nuclear gate fidelity requires a careful choice of magnetic fields for initialization and readout protocols. In this work, we investigate the variation of the magnetic field orientation to optimize the electron and nuclear spin Rabi frequencies and branching ratios, thereby improving the single-shot readout fidelity of a low-strain SnV and enhancing the robustness of quantum memory operations.
Keywords: tin-vacancy center; nuclear spin; quantum repeater; spin-photon interface; microwave control