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High-fidelity spin and optical control of single silicon-vacancy centres in silicon carbide
Univ Stuttgart, Germany; Inst Quantum Sci and Technol, Germany.
Univ Stuttgart, Germany; Inst Quantum Sci and Technol, Germany.
Univ Stuttgart, Germany; Inst Quantum Sci and Technol, Germany.
Univ Stuttgart, Germany; Inst Quantum Sci and Technol, Germany.
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 1954Article in journal (Refereed) Published
Abstract [en]

Scalable quantum networking requires quantum systems with quantum processing capabilities. Solid state spin systems with reliable spin-optical interfaces are a leading hardware in this regard. However, available systems suffer from large electron-phonon interaction or fast spin dephasing. Here, we demonstrate that the negatively charged silicon-vacancy centre in silicon carbide is immune to both drawbacks. Thanks to its (4)A(2) symmetry in ground and excited states, optical resonances are stable with near-Fourier-transform-limited linewidths, allowing exploitation of the spin selectivity of the optical transitions. In combination with millisecond-long spin coherence times originating from the high-purity crystal, we demonstrate high-fidelity optical initialization and coherent spin control, which we exploit to show coherent coupling to single nuclear spins with similar to 1 kHz resolution. The summary of our findings makes this defect a prime candidate for realising memory-assisted quantum network applications using semiconductor-based spin-to-photon interfaces and coherently coupled nuclear spins.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 10, article id 1954
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-156930DOI: 10.1038/s41467-019-09873-9ISI: 000465838600006PubMedID: 31028260OAI: oai:DiVA.org:liu-156930DiVA, id: diva2:1318694
Note

Funding Agencies|Carl-Zeiss-Stiftung; European Research Council (ERC) grant SMel; European Commission Marie Curie ETN "QuSCo" [765267]; Max Planck Society; Humboldt Foundation; German Science Foundation [SPP 1601]; KIST institutional program [2E29580]; EPSRC [EP/P019803/1]; Royal Society; Swedish Research Council [VR 2016-04068, VR 2016-05362]; Carl Trygger Stiftelse for Vetenskaplig Forskning [CTS 15: 339]; Knut and Alice Wallenberg Foundation [KAW 2018.0071]; Swedish Energy Agency [43611-1]; JSPS KAKENHI [17H01056]; Hungarian NKFIH of the EU QuantERA Nanospin project [NN118161]; National Quantum Technology Program [2017-1.2.1-NKP-2017-00001]

Available from: 2019-05-28 Created: 2019-05-28 Last updated: 2019-10-29

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