1. Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1FD, UK.
2. Quantum Architectures and Computation Group, Microsoft Research, Redmond, WA 98052, USA.
3. Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
4. Google Inc., Venice, CA 90291, USA.
5. Quantum Engineering Centre for Doctoral Training, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1FD, UK.
6. Department of Physics, Imperial College London, London, SW7 2AZ, UK.
7. School of Chemistry, University of Bristol, Bristol BS8 1TS, UK.
8. Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
9. State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics, Sun Yat-sen University, Guangzhou 510275, China.