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Q: Fachverband Quantenoptik und Photonik
Q 43: Color Centers III
Q 43.6: Vortrag
Donnerstag, 14. März 2024, 12:15–12:30, Aula
Laser noise compensation to enable high fidelity spin-photon gates — •Mara Brinkmann1, Lennart Manthey1, Donika Imeri1,2, Rikhav Shah1, Timo Eikelmann1, Konstantin Beck1, and Ralf Riedinger1,2 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
Current research areas in quantum communication entail quantum networks, consisting of optically connected nodes, which can efficiently distribute entanglement. We use silicon-vacancy (SiV) color centers in diamond, which show great potential for optically coupled quantum processors. To address the probes at millikelvin temperature and achieve high fidelities for spin-photon quantum gates, we rely on pulsed weak laser light. Sideband-noise, such as relaxation oscillations, can result in off-resonant scattering, reducing the gate fidelity. Here we present our approach to optimize the temporal and spectral properties of the laser light, employing mode cleaner cavities. The spin-photon gates can subsequently be used to create high-fidelity entanglement between remote quantum processors.
Keywords: Color Centers; Quantum Repeater; Laser Noise; Spin-Photon Gates; Quantum Networks