1. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
2. Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
3. Institute for Quantum Computing, University of Waterloo, Waterloo, ON N2L3G1, Canada
4. Department of Physics, University of Waterloo, Waterloo, ON N2L3G1, Canada
5. Department of Chemistry, University of Waterloo, Waterloo, ON N2L3G1, Canada
6. Perimeter Institute for Theoretical Physics, Waterloo, ON N2L2Y5, Canada
7. Canadian Institute for Advanced Research, Toronto, ON, M5G1Z8, Canada
8. National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
9. Biophysics and Biochemistry Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20814, USA