OxTalks will soon move to the new Halo platform and will become 'Oxford Events.' There will be a need for an OxTalks freeze. This was previously planned for Friday 14th November – a new date will be shared as soon as it is available (full details will be available on the Staff Gateway).
In the meantime, the OxTalks site will remain active and events will continue to be published.
If staff have any questions about the Oxford Events launch, please contact halo@digital.ox.ac.uk
Abstract: Quantum networks and sensing require solid-state spin-photon interfaces that combine single-photon generation and long-lived spin coherence with scalable device integration, ideally at ambient conditions. Despite rapid progress reported across several candidate systems, those possessing quantum coherent single spins at room temperature remain extremely rare.
In this talk, I will show quantum coherent control under ambient conditions of a single-photon emitting defect in hexagonal boron nitride [1]2. I will show how this carbon-related defect has a spin-triplet electronic ground-state manifold. I will reveal that the spin coherence is governed predominantly by coupling to only a few proximal nuclei and is prolonged by decoupling protocols. Finally, show how these results open routes to explore this defect type for nanoscale magnetometry [3].
[1] Stern, H.L., M. Gilardoni, C., Gu, Q. et al. A quantum coherent spin in hexagonal boron nitride at ambient conditions. Nat. Mater. 23, 1379–1385 (2024).
[2] Stern, H.L., Gu, Q., Jarman, J. et al. Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride. Nat Commun 13, 618 (2022).
[3] Gilardoni, C. M., Eizagirre Barker, S., Curtin, C. L., Fraser, S. A., Powell, O. F.J., Lewis, D. K., Deng, X., Ramsay, A. J., Li, C., Aharonovich, I., Tan, H. H., Atatüre, M. and Stern, H. L.. arXiv.:2408.10348 (2024).
