Coherent control of the silicon-vacancy spin in diamond
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2017-01-24 |
| Journal | Apollo (University of Cambridge) |
| Authors | Benjamin Pingault, David Jarausch, Christian Hepp, Lina E. Klintberg, Jonas N. Becker |
| Institutions | Element Six (United Kingdom), University of Cambridge |
Abstract
Section titled âAbstractâSpin 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.