Spectroscopy and coherent manipulation of single and coupled flux qubits. - Yu-Lin, Wu; Hui, Deng; Ke-Qiang, Huang; Ye, Tian; Hai-Feng, Yu; Guang-Ming, Xue; Yi-Rong, Jin; Jie, Li; Shi-Ping, Zhao; Dong-Ning, Zheng (Chinese Physics B, 2013)