About the Authors

Stefan Nowak

Affiliation Institut für Theoretische Physik, Universität zu Köln, Cologne, Germany

Johannes Neidhart

Affiliation Institut für Theoretische Physik, Universität zu Köln, Cologne, Germany

Ivan G. Szendro

Affiliation Institut für Theoretische Physik, Universität zu Köln, Cologne, Germany

Joachim Krug

krug@thp.uni-koeln.de

Affiliation Institut für Theoretische Physik, Universität zu Köln, Cologne, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SN JN IGS JK. Performed the experiments: SN JN IGS. Analyzed the data: SN JN IGS JK. Contributed reagents/materials/analysis tools: SN JN IGS. Contributed to the writing of the manuscript: SN JN IGS JK.