1Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026 2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026
Abstract：The coupled negatively charged nitrogen-vacancy (NV$^{-}$) center system is a promising candidate for scalable quantum information techniques. In this work, ionized nitrogen molecules are implanted into bulk diamond to generate coupled NV$^{-}$ center pairs. The two-photon autocorrelation measurement and optically detected magnetic resonance measurement are carried out to confirm the production of the NV$^{-}$ center pair. Also, both 1.3 μs decoherence time and 4.9 kHz magnetic coupling strength of the NV$^{-}$ center pair are measured by controlling and detecting the spin states. Along with nanoscale manipulation and detection methods, such coupled NV$^{-}$ centers through short distance dipole–dipole interaction would show high potential in scalable quantum information processes.
2016, Vol. 33 
