1. Institute for Quantum Computing Department of Chemistry Centre for Advanced Materials Joining University of Waterloo Waterloo Ontario N2L 3G1 Canada
2. Department of Physics and Astronomy University of Waterloo Waterloo Ontario N2L 3G1 Canada
3. School of Mechanical Engineering and Automation Beihang University Beijing 100191 P. R. China
4. Centre for Advanced Materials Joining Waterloo Institute for Nanotechnology Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo Ontario N2L 3G1 Canada
5. State Key Laboratory of Tribology Tsinghua University Beijing 100084 P. R. China