Landau-Zener-Stuckelberg-Majorana interference in a 3D transmon driven   by a chirped microwave
  By driving a 3D transmon with microwave fields, we generate an effective avoided energy-level crossing. Then we chirp microwave frequency, which is equivalent to driving the system through the avoided energy-level crossing by sweeping the avoided crossing. A double-passage chirp produces Landau-Zener-St\"uckelberg-Majorana interference that agree well with the numerical results. Our method is fully applicable to other quantum systems that contain no intrinsic avoided level crossing, providing an alternative approach for quantum control and quantum simulation. 
Ming Gong, Yu Zhou, Dong Lan, Yunyi Fan, Jiazheng Pan, Haifeng Yu,   Jian Chen, Guozhu Sun, Yang Yu, Siyuan Han, and Peiheng Wu
cond-mat.supr-con cond-mat.mes-hall quant-ph