Author Affiliations

Russell J. Barbour,^1,2,4,* Paul A. Dalgarno,^2,4 Arran Curran,^2,4 Kris M. Nowak,^2,4 Howard J. Baker,^2,4 Denis R. Hall,^2,4 Nick G. Stoltz,^3,4 Pierre M. Petroff,^3,4 and Richard J. Warburton^2,3,4

¹Department of Physics and Astronomy, University of Washington, Washington 98195, USA

²School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom

³Materials Department, University of California, Santa Barbara, California 93106, USA

⁴Department of Physics, University of Basel, Klingelbergstrasse 82, Basel 4056, Switzerland

^*Corresponding author: Barbour2@uw.edu