Strongly coupled spins of silicon-vacancy centers inside a nanodiamond with sub-megahertz linewidth

The search for long-lived quantum memories, which can be efficiently interfaced with flying qubits, is longstanding. One possible solution is to use the electron spin of a color center in diamond to mediate interaction between a long-lived nuclear spin and a photon. Realizing this in a nanodiamond f...

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Bibliographic Details
Published in:Nanophotonics (Berlin, Germany) Germany), 2024-05, Vol.13 (13), p.2361-2366
Main Authors: Klotz, Marco, Waltrich, Richard, Lettner, Niklas, Agafonov, Viatcheslav N., Kubanek, Alexander
Format: Article
Language:English
Subjects:
Color centers
Coupling
Diamonds
Electron spin
Electrons
Hybrid systems
nanodiamond
Nanostructure
Nuclear spin
Optics
Point defects
quantum optics
Qubits (quantum computing)
Silicon
silicon-vacancy center
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Summary:The search for long-lived quantum memories, which can be efficiently interfaced with flying qubits, is longstanding. One possible solution is to use the electron spin of a color center in diamond to mediate interaction between a long-lived nuclear spin and a photon. Realizing this in a nanodiamond furthermore facilitates the integration into photonic devices and enables the realization of hybrid quantum systems with access to quantum memories. Here, we investigated the spin environment of negatively charged silicon-vacancy centers in a nanodiamond and demonstrate strong coupling of its electron spin, while the electron spin’s decoherence rate remained below 1 MHz. We furthermore demonstrate multi-spin coupling with the potential to establish registers of quantum memories in nanodiamonds.
ISSN:2192-8614
2192-8606
2192-8614
DOI:10.1515/nanoph-2023-0927