1. Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
2. Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
3. Department of Physics, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
4. Institute of Physics, University of Freiburg, D-79104 Freiburg, Germany
5. EUCOR Centre for Quantum Science and Quantum Computing, University of Freiburg, D-79104 Freiburg, Germany
6. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
7. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
8. Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China