About the Authors

Raffaello Potestio

Affiliation SISSA - Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy

Cristian Micheletti

michelet@sissa.it

Affiliations SISSA - Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy, DEMOCRITOS CNR-IOM, Trieste, Italy, Italian Institute of Technology (SISSA unit), Trieste, Italy

Henri Orland

Affiliation Institut de Physique Théorique, CEA, Gif-sur-Yvette, France

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: RP CM. Wrote the paper: RP CM HO. Conceived and designed the study: RP CM HO. Contributed analysis tools: RP CM. Processed the databases and gathered the data: RP.