Coupled micro- and nanomechanical oscillators are of fundamental and technical interest for emerging quantum technologies. Upon interfacing with long-lived solid-state spins, the coherent manipulation of the quantum hybrid system becomes possible even at ambient conditions. While, the ability of these systems to act as a quantum bus inducing long-range spin-spin interactions has been known, the possibility to coherently couple electron/nuclear spins to the common modes of multiple oscillators and map their mechanical motion to spin-polarization has not been experimentally demonstrated. We here report experiments on interfacing spins to the common modes of a coupled cantilever system, and show their correlation by translating ultra-low forces induced by radiation from one oscillator to a distant spin. Further, we analyze the coherent spin-spin coupling induced by the common modes and estimate the entanglement generation among distant spins.
@article{arxiv.1911.12642,
title = {Spin-phonon interfaces in coupled nanomechanical cantilevers},
author = {Thomas Oeckinghaus and S. Ali Momenzadeh and Philipp Scheiger and Tetyana Shalomayeva and Amit Finkler and Durga Dasari and Rainer Stöhr and Jörg Wrachtrup},
journal= {arXiv preprint arXiv:1911.12642},
year = {2020}
}