About the Authors

Siebe B van Albada

Affiliation FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands

Pieter Rein ten Wolde

To whom correspondence should be addressed. E-mail: tenwolde@amolf.nl

Affiliation FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

PRtW conceived and designed the experiments. SBvA performed the experiments and analyzed the data. SBvA and PRtW wrote the paper.