About the Authors

Giovanni Iacono

Affiliation Department of Functional Analysis, International School for Advanced Studies, Trieste, Italy

Claudio Altafini

Affiliation Department of Functional Analysis, International School for Advanced Studies, Trieste, Italy

Vincent Torre

torre@sissa.it

Affiliations Department of Functional Analysis, International School for Advanced Studies, Trieste, Italy, IIT Italian Institute of Technology, Genova, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GI VT. Performed the experiments: GI. Analyzed the data: GI. Contributed reagents/materials/analysis tools: VT. Wrote the paper: GI. Supervised the analysis part: CA.