中国物理B ›› 2017, Vol. 26 ›› Issue (2): 20305-020305.doi: 10.1088/1674-1056/26/2/020305
Ya-Rui Zheng(郑亚锐), Jian Xing(邢健), Yan-Chun Chang(常彦春), Zhi-Guang Yan(闫智广), Hui Deng(邓辉), Yu-Lin Wu(吴玉林), Li Lü(吕力), Xin-Yu Pan(潘新宇), Xiao-Bo Zhu(朱晓波), Dong-Ning Zheng(郑东宁)
Ya-Rui Zheng(郑亚锐), Jian Xing(邢健), Yan-Chun Chang(常彦春), Zhi-Guang Yan(闫智广), Hui Deng(邓辉), Yu-Lin Wu(吴玉林), Li Lü(吕力), Xin-Yu Pan(潘新宇), Xiao-Bo Zhu(朱晓波), Dong-Ning Zheng(郑东宁)
摘要: Hybrid quantum system of negatively charged nitrogen-vacancy (NV-) centers in diamond and superconducting qubits provide the possibility to extend the performances of both systems. In this work, we numerically simulate the coupling strength between NV- ensembles and superconducting flux qubits and obtain a lower bound of 1016 cm-3 for NV- concentration to achieve a sufficiently strong coupling of 10 MHz when the gap between NV-ensemble and flux qubit is 0. Moreover, we create NV- ensembles in different types of diamonds by 14N+ and 12C+ ion implantation, electron irradiation, and high temperature annealing. We obtain an NV- concentration of 1.05×1016 cm-3 in the diamond with 1-ppm nitrogen impurity, which is expected to have a long coherence time for the low nitrogen impurity concentration. This shows a step toward performance improvement of flux qubit-NV- hybrid system.
中图分类号: (Quantum computation architectures and implementations)