[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100000, Peoples R China
[3] S China Normal Univ, Lab Quantum Informat Technol, Inst Condensed Matter Phys, Sch Phys & Telecommun Engn, Guangzhou 510006, Guangdong, Peoples R China
[4] Jimei Univ, Inst Appl Phys, Xiamen 361021, Peoples R China
[5] Lanzhou Univ, Dept Phys, Lanzhou 730000, Peoples R China