1. Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
2. Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
3. Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
4. National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
5. Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
6. Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L2Y5, Canada
7. Department of Physics, Tulane University, New Orleans, Louisiana 70118, USA
8. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
9. Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
10. Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
11. Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47408, USA
12. Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA