Coherent control of the silicon-vacancy spin in diamond

Benjamin Pingault (), David-Dominik Jarausch, Christian Hepp, Lina Klintberg, Jonas N. Becker, Matthew Markham, Christoph Becher and Mete Atatüre ()
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Benjamin Pingault: Cavendish Laboratory, University of Cambridge
David-Dominik Jarausch: Cavendish Laboratory, University of Cambridge
Christian Hepp: Cavendish Laboratory, University of Cambridge
Lina Klintberg: Cavendish Laboratory, University of Cambridge
Jonas N. Becker: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes
Matthew Markham: Element Six Ltd., Global Innovation Centre
Christoph Becher: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes
Mete Atatüre: Cavendish Laboratory, University of Cambridge

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Spin impurities in diamond have emerged as a promising building block in a wide range of solid-state-based quantum technologies. The negatively charged silicon-vacancy centre combines the advantages of its high-quality photonic properties with a ground-state electronic spin, which can be read out optically. However, for this spin to be operational as a quantum bit, full quantum control is essential. Here we report the measurement of optically detected magnetic resonance and the demonstration of coherent control of a single silicon-vacancy centre spin with a microwave field. Using Ramsey interferometry, we directly measure a spin coherence time, T2*, of 115±9 ns at 3.6 K. The temperature dependence of coherence times indicates that dephasing and decay of the spin arise from single-phonon-mediated excitation between orbital branches of the ground state. Our results enable the silicon-vacancy centre spin to become a controllable resource to establish spin-photon quantum interfaces.

Date: 2017
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DOI: 10.1038/ncomms15579

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