We present a general method to realize resonant coupling between spins even though their energies are of different scales. Applying the method to the electron and nuclear spin systems such as a nitrogen-vacancy (NV) center with its nearby nuclei, we show that a specific dynamical switching of the electron spin Rabi frequency achieves efficient electron-nuclear coupling, providing a much stronger quantum sensing signal and dynamic nuclear polarization than previous methods. This protocol has applications in high-field nanoscale nuclear magnetic resonances as well as low-power quantum control of nuclear spins.
@article{arxiv.2311.10650,
title = {Enhancing Electron-Nuclear Resonances by Dynamical Control Switching},
author = {Sichen Xu and Chanying Xie and Zhen-Yu Wang},
journal= {arXiv preprint arXiv:2311.10650},
year = {2023}
}