Coherent dynamics of strongly interacting electronic spin defects in hexagonal boron nitride.

ABSTRACT: Optically active spin defects in van der Waals materials are promising platforms for modern quantum technologies. Here we investigate the coherent dynamics of strongly interacting ensembles of negatively charged boron-vacancy ([Formula: see text]) centers in hexagonal boron nitride (hBN) with varying defect density. By employing advanced dynamical decoupling sequences to selectively isolate different dephasing sources, we observe more than 5-fold improvement in the measured coherence times across all hBN samples. Crucially, we identify that the many-body interaction within the [Formula: see text] ensemble plays a substantial role in the coherent dynamics, which is then used to directly estimate the concentration of [Formula: see text]. We find that at high ion implantation dosage, only a s

SUBMITTER: Gong R 

PROVIDER: S-EPMC10244381 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature