Martin Wood Complex, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU
Professor Hannah Stern, University of Oxford
Prof Amalia Coldea
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 spin in a new platform, a two-dimensional material, hexagonal boron nitride. 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. In total, these results allow for a room-temperature spin qubit coupled to a multi-qubit quantum register or sensor with nanoscale sample proximity.