High-fidelity spin and optical control of single silicon-vacancy centres in silicon carbide

Nagy R, Niethammer M, Widmann M, Chen YC, Udvarhelyi P, Bonato C, Hassan JU, Karhu R, Ivanov IG, Nguyen Tien Son , Maze JR, Ohshima T, Soykal OO, Gali A, Lee SY, Kaiser F, Wrachtrup J (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 10

Article Number: 1954

Journal Issue: 1

DOI: 10.1038/s41467-019-09873-9

Abstract

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 ∼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.

Authors with CRIS profile

Roland Nagy

Involved external institutions

Universität Stuttgart DE Germany (DE) U.S. Naval Research Laboratory US United States (USA) (US) Heriot-Watt University GB United Kingdom (GB) Korea Institute of Science and Technology (KIST) / 한국과학기술연구원 KR Korea, Republic of (KR) Linköping University SE Sweden (SE) Hungarian Academy of Sciences / Magyar Tudományos Akadémia (MTA) HU Hungary (HU) Pontificia Universidad Católica de Chile CL Chile (CL) National Institutes for Quantum and Radiological Science and Technology JP Japan (JP)

How to cite

APA:

Nagy, R., Niethammer, M., Widmann, M., Chen, Y.-C., Udvarhelyi, P., Bonato, C.,... Wrachtrup, J. (2019). High-fidelity spin and optical control of single silicon-vacancy centres in silicon carbide. Nature Communications, 10(1). https://dx.doi.org/10.1038/s41467-019-09873-9

MLA:

Nagy, Roland, et al. "High-fidelity spin and optical control of single silicon-vacancy centres in silicon carbide." Nature Communications 10.1 (2019).

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