Figure 1
APS/S. Benjamin and J. Smith

Figure 1: Lower right: Structurally, the NV center consists of a pair of adjacent defects in the diamond lattice, namely, a nitrogen atom substituting for a carbon, together with a vacancy (a missing atom). Main figure: In abstract terms, each NV center is composed of at least one nuclear spin, and an electron complex with total spin 1. Bermudez et al. have determined that under a suitable driving field, the electron spins will constitute a channel by which the nuclei in neighboring NV centers can interact, thus achieving entanglement.