About the Authors

Shenshen Wang

shenshen@physics.ucla.edu

Affiliation Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: SW. Formal analysis: SW. Funding acquisition: SW. Methodology: SW. Software: SW. Validation: SW. Visualization: SW. Writing – original draft: SW. Writing – review & editing: SW.