Hybrid quantum device with nitrogen-vacancy centers in diamond coupled to carbon nanotubes

摘要

We show that nitrogen-vacancy (NV) centers in diamond interfaced with asuspended carbon nanotube carrying a dc current can facilitate aspin-nanomechanical hybrid device. We demonstrate that strong magnetomechanicalinteractions between a single NV spin and the vibrational mode of the suspendednanotube can be engineered and dynamically tuned by external control over thesystem parameters. This spin-nanomechanical setup with strong, \emph{intrinsic}and \emph{tunable} magnetomechanical couplings allows for the construction ofhybrid quantum devices with NV centers and carbon-based nanostructures, as wellas phonon-mediated quantum information processing with spin qubits.