About the Authors

Siu-Fai Chow

Affiliation Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, Illinois, United States of America

Stuart D. Wick

Affiliation Department of Physics, North Central College, Naperville, Illinois, United States of America

Hermann Riecke

h-riecke@northwestern.edu

Affiliations Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, Illinois, United States of America, Northwestern Institute on Complex Systems, Northwestern University, Evanston, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SFC SDW HR. Performed the experiments: SFC SDW HR. Analyzed the data: SFC SDW HR. Wrote the paper: HR.