1. Institute of Atomic and Molecular Physics
2. Sichuan University
3. Chengdu 610065
4. China
5. School of Mathematics and Physics
6. Department of Mechanical Engineering
7. Qinghai University
8. Xining
9. Centre for Science at Extreme Conditions and SUPA
10. School of Physics and Astronomy
11. The University of Edinburgh
12. Edinburgh EH9 3FD
13. UK