1. Department of Physics and Tsinghua‐Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China
2. Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing 100088 China
3. Frontier Science Center for Quantum Information Beijing 100084 China
4. State Key Laboratory of Low‐Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China
5. Institute for Advanced Study Tsinghua University Beijing 100084 China