1. Institut Quantique, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada
2. Département de physique, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada
3. Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
4. Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
5. Center for Integrated Nanotechnology, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
6. Quantum Information Science Program, Canadian Institute for Advanced Research, Toronto M5G 1Z8, Canada