| Institution: | 1. School of Science, Beijing Information Science and Technology University, Beijing 100192, PR China;2. Department of Systems Science, Business School, University of Shanghai for Science and Technology, Shanghai 200093, PR China;3. Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi''an 710600, PR China;4. College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, PR China;5. Department of Applied Physics, Hebei University of Technology, Tianjin 300401, PR China;6. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, PR China |
