Replication Data for: Parallel single-shot measurement and coherent control of solid-state spins below the diffraction limit

Solid-state spin defects are a promising platform for quantum science and technology. The realization of larger-scale quantum systems with solid-state defects will require high-fidelity control over multiple defects with nanoscale separations, with strong spin-spin interactions for multi-qubit logic operations and the creation of entangled states. We demonstrate an optical frequency-domain multiplexing technique, allowing high-fidelity initialization and single-shot spin measurement of six rare earth Er3+ ions, within the sub-wavelength volume of a single, silicon photonic crystal cavity. We also demonstrate sub-wavelength control over coherent spin rotations using an optical AC Stark shift. Our approach may be scaled to large numbers of ions with arbitrarily small separation, and is a step towards realizing strongly interacting atomic defect ensembles with applications to quantum information processing and fundamental studies of many-body dynamics.