Coherent electrical driving of quantum spins via localized magnons*

Spin-spin interactions in quantum-classical spin hybrids are promising enablers of quantum spintronics. For example, dipolar interactions between classical magnets and quantum dot (QD) spins have enabled electrically driven high-fidelity quantum processors [Nat. Nano 13, 102 (2018)]. Motivated by higher operating temperatures, dipolar interactions in quantum impurity (QI) spin [like Nitrogen vacancy (NV) center]-classical magnet hybrids have been used for quantum sensing of ground state configurations-solitons [Nature 549, 252 (2017); Nat. Commun. 9, 2712 (2018)], as well as, excitations-magnons [Science 357, 195 (2017)]. In addition, magnons have mediated long-distance coherent coupling between NVs and microwave antennas [npj Quantum Info. 3, 28 (2017)]. In contrast to QD spin-magnet hybrids, coherent electrical driving of QI spins is, however, missing. Here, we propose to utilize spin-orbit induced electrical driving of magnons [Nano Lett. 2017, 17, 1, 572], to mitigate this challenge. Specifically, we study coherent and incoherent coupling of QI spins in proximity to electrically controlled localized magnons in nanomagnets-showing coherent electrical driving of QI spins.