Improvement on the manipulation of a single nitrogen-vacancy spin and microwave photon at single-quantum level

Yuan Zhou,Dong-Yan Lü,Guang-Hui Wang,Yan-Hua Fu,Ming-Yao He,Hong-Tao Ren

Figure 1. (Color online) (a) Potential photon-phonon-spin hybrid setup with respect to the triple coupling system mediated by a squeezed mechanical mode. A sharp nano magnetic tip is attached at the end of the silicon cantilever with its tunable spring constant, above which a single NV center is set near to this magnet. A superconducting coplanar MW cavity also couples to this mechanical cantilever through capacitive interactions. As a result, it is available for this MR to achieve capacitive coupling to the MW cavity and magnetic coupling to the single NV spin, respectively. (b) Schematic of enhancing the indirect coupling between the MW cavity and single NV spin through MPA. (c) Ground-state energy diagram for a single NV center in the basis of bare state and dressed state.