SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 33: Poster II
HL 33.29: Poster
Mittwoch, 29. März 2023, 17:00–19:00, P1
Design of a microwave resonator for coherent nuclear spin control of 13C and 29Si isotopes near V2 color centers in 4H-SiC at cryogenic temperatures — •Jan Philipp Ahnfeldt1, Fedor Hrunski1, Shravan Kumar Parthasarathy1,2, Maximilian Hollendonner1, Daniel Scheller1, Andre Pointner1, and Roland Nagy1 — 1Chair of Electron Devices, FAU Erlangen-Nürnberg, Erlangen, Germany — 2Fraunhofer Institute for Integrated Systems and Device Technology (IISB), Erlangen, Germany
One step to meaningful quantum technologies is to scale up the currently developed ones. This can be done by parallelizing several quantum systems through a quantum network. Therefore it is crucial that the network contains quantum memory nodes in which the quantum system used has a long coherence time. This can be ensured by the nuclear spin of the 13C or 29Si isotopes surrounding a silicon vacancy in 4H-SiC. However, due to the low gyromagnetic ratio of a nuclear spin a large magnetic flux is needed for the spin control. Accordingly, a large RF power with a frequency in the upper kHz domain is required. Because the power dissipation causes problems when upscaling these systems, it is important to improve the spin control’s efficiency. Hence, a resonator creating a standing magnetic wave polarized perpendicular to the quantization axis of the vacancy seems to be a promising approach. Since it must operate at room and cryogenic temperatures, the resonator must be mechanically stable and needs a wide bandwidth. Therefore, several resonators are investigated which could meet these requirements in a small package of a few cubic centimeters.