About the Authors

Akira Fushiki

Affiliation Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan

Hiroshi Kohsaka

Affiliation Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan

Akinao Nose

nose@k.u-tokyo.ac.jp

Affiliations Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan, Department of Physics, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AF HK AN. Performed the experiments: AF. Analyzed the data: AF. Wrote the paper: AF HK AN.