About the Authors
FOM Institute AMOLF, Amsterdam, The Netherlands
University of Heidelberg, Institute for Theoretical Physics, Heidelberg, Germany
The authors have declared that no competing interests exist.
Conceived and designed the experiments: TRS TE PRtW. Performed the experiments: TRS. Analyzed the data: TRS. Contributed reagents/materials/analysis tools: TRS TE. Wrote the paper: TRS TE PRtW. Designed the software used for simulations and analysis: TRS TE.