About the Authors

Yueling Chen

Affiliations Institute of Theoretical Physics, Lanzhou University, Lanzhou, China, Department of Physics, Gansu College of Traditional Chinese Medicine, Lanzhou, China

Hui Zhang

Affiliation Institute of Theoretical Physics, Lanzhou University, Lanzhou, China

Hengtong Wang

Affiliation Institute of Theoretical Physics, Lanzhou University, Lanzhou, China

Lianchun Yu

Affiliation Institute of Theoretical Physics, Lanzhou University, Lanzhou, China

Yong Chen

ychen@lzu.edu.cn

Affiliations Institute of Theoretical Physics, Lanzhou University, Lanzhou, China, Department of Mathematics, King’s College London, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YC LCY YLC. Performed the experiments: YLC HZ. Analyzed the data: YC YLC LCY HZ HTW. Contributed reagents/materials/analysis tools: YLC HZ. Wrote the paper: YLC YC.