1. Kavli Institute
of Nanoscience Delft, Delft University of Technology, Delft 2628 CJ, The Netherlands
2. Department of Applied Physics, Royal Institute of Technology (KTH), Stockholm 106 91, Sweden
3. National Research Council of Canada, Ottawa, ON K1A
0R6, Canada
4. Institute for Quantum Computing and Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada