Nuclear spins in the solid state environment of diamond are highly coherent, but difficult to rapidly control due to the small nuclear gyromagnetic ratio. Here we demonstrate a more than 50-fold enhancement of the effective nuclear gyromagnetic ratio by coupling the nuclear spin to an electronic spin of a nitrogen-vacancy (NV) center in diamond. The enhancement allows for faster nuclear spin rotations and is in good agreement with second-order perturbation theory. The method may be applied to other systems with similar electron-nuclear spin interactions, such as phosphorous donors in silicon, opening up the possibility of fast and direct nuclear spin control in coupled spin systems.
@article{arxiv.1503.07464,
title = {Hyperfine-Enhanced Gyromagnetic Ratio of a Nuclear Spin in Diamond},
author = {S. Sangtawesin and J. R. Petta},
journal= {arXiv preprint arXiv:1503.07464},
year = {2016}
}