1. Department of Physics, State Key Laboratory of Low‐Dimensional Quantum Physics Tsinghua University Beijing 100084 China
2. Beijing Institute of Radio Measurement The second Academy of China Aerospace Science and Industry Corporation (CASIC) Beijing 100854 China
3. Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China
4. Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg SE‐41296 Sweden
5. School of Information Tsinghua University Beijing 100084 China
6. Frontier Science Center for Quantum Information Beijing 100084 China
7. Beijing National Research Center for Information Science and Technology Beijing 100084 China
8. Beijing Academy of Quantum Information Sciences Beijing 100193 China