1. College of Physics and Technology, Guangxi Normal University, Guilin, Guangxi 541004, China
2. Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, and Key Laboratory of Quantum Theory and Applications of MoE, Lanzhou University, Lanzhou, Gansu 730000, China
3. Department of Physics, Hubei University, Wuhan 430062, China
4. Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA
5. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA