Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 71: Quantum Control II (joint session QI/Q)

Q 71.3: Vortrag

Freitag, 14. März 2025, 11:30–11:45, HS II

Spin control of highly-strained silicon-vacancy centers in nanodiamonds — •Andreas Tangemann, Marco Klotz, and Alexander Kubanek — Institute for Quantum Optics, University Ulm, Germany

Spin qubits in solid state hosts are, due to their promise of scalability, candidates for the realization of quantum networks. The good spin properties of diamond paired with the optical properties of group-IV defects make them of special interest. We are using highly-strained silicon vacancy centers in nanodiamonds to mitigate phonon induced dephasing of the spin qubit at liquid Helium temperature, due to orbital ground state splittings exceeding 1THz. Here we show coherent control of the electron spin, access to a 13C nuclear spin via indirect control and nuclear spin single-shot readout, as well as coherent control over the optical dipole of the SiV centers. These techniques lay the foundation for future quantum network experiments with SiV centers at liquid Helium temperatures.

Keywords: Group IV Defect Centers; Diamond; Spin Control; Quantum Information