Optically coupled nitrogen vacancy-defect system for scalable qubit arrays

A system for coupling Nitrogen Vacancy (NV)-defects in a quantum computing architecture, the system comprising:

• a substantially isotopically pure diamond wafer comprising a plurality of separated implantation sites, at least a portion of which comprise a single NV-defect;
• an optical cavity system coupled to the diamond wafer, the optical cavity system comprising a plurality of cavity sites aligned to the separated implantation sites;
• an integrated optics system coupled to the optical cavity system, the integrated optics system comprising:
• one or more optical waveguides and one or more switchable elements associated with each optical waveguide, one or more photon sources, one or more photon detectors, and one or more fiber optic connections coupled to one or more of:
• one of the photon sources, one of the photon detectors, and one or more of the switchable elements;
• wherein one or more of the one or more optical waveguides, one or more switchable elements, one or more photon sources, one or more photon detectors, and one or more fiber optic connections of the integrated optics system are on a first chip module that is physically separate from the diamond wafer;
• wherein the optical cavity comprises a cantilever mechanism comprising a cantilever which is part of a device layer, the cantilever configured to carry, at one end, one of the micro mirrors forming one side of one of the cavities, the cantilever attached, at an opposing end, to a handle layer via an oxide layer;
• wherein a first one of the switchable elements of the first chip module couples a first pair of single NV-defects by splitting a beam emitted by one of the photon sources, via a first one of the optical waveguides, to the cavity sites aligned to the implantation sites of the first pair of single NV-defects;
• and
• wherein a second one of the switchable elements of the first chip module couples a second pair of single NV-defects by splitting a beam emitted by one of the photon sources, via a second one of the optical waveguides, to the cavity sites aligned to the implantation sites of the second pair of single NV-defects.