Ultrafast all-optical coherent control of single silicon vacancy colour centres in diamond

Jonas Nils Becker, Johannes Görlitz, Carsten Arend, Matthew Markham and Christoph Becher ()
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Jonas Nils Becker: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes
Johannes Görlitz: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes
Carsten Arend: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes
Matthew Markham: Global Innovation Centre, Element Six Limited, Global Innovation Centre
Christoph Becher: Fachrichtung 7.2 (Experimentalphysik), Universität des Saarlandes

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract Complete control of the state of a quantum bit (qubit) is a fundamental requirement for any quantum information processing (QIP) system. In this context, all-optical control techniques offer the advantage of a well-localized and potentially ultrafast manipulation of individual qubits in multi-qubit systems. Recently, the negatively charged silicon vacancy centre (SiV−) in diamond has emerged as a novel promising system for QIP due to its superior spectral properties and advantageous electronic structure, offering an optically accessible Λ-type level system with large orbital splittings. Here, we report on all-optical resonant as well as Raman-based coherent control of a single SiV− using ultrafast pulses as short as 1 ps, significantly faster than the centre’s phonon-limited ground state coherence time of about 40 ns. These measurements prove the accessibility of a complete set of single-qubit operations relying solely on optical fields and pave the way for high-speed QIP applications using SiV− centres.

Date: 2016
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DOI: 10.1038/ncomms13512

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