@article{oai:repo.qst.go.jp:00076002,
 author = {Nagy, R. and Niethammer, M. and Widmann, M. and Y., -C. Chen and Udvarhelyi, P. and Bonato, C. and U. Hassan, J. and Karhu, R. and G. Ivanov, I. and T. Son, N. and R. Maze, J. and Ohshima, Takeshi and O. Soykal, O. and Gali, A. and S.-Y., Lee and Kaiser, F. and Wrachtrup, J. and Ohshima, Takeshi},
 journal = {Nature Communications},
 month = {Apr},
 note = {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 4A2 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 ∼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.},
 pages = {1954-1--1954-8},
 title = {High-Fidelity Spin and Optical Control of Single Silicon-Vacancy Centres in Cilicon Carbide},
 volume = {10},
 year = {2019}
}