Brokered graph-state quantum computation

Using the graph-state approach to quantum computation, one can avoid the need for complex array nanostructures in which quantum bits (qubits) interact directly. Instead one can employ simple 'atom-like' nanostructures, coupled over macroscopic distances via optical emissions. Here, we describe a robust coupling procedure, which we call brokering, that is especially well suited to nanostructures bearing both nuclear and electron spins. We describe how this approach can be implemented with N−V centre materials.