1. Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education)Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong University Shanghai 200240 China
2. Tsung‐Dao Lee InstituteShanghai Jiao Tong University Shanghai 200240 China
3. Department of PhysicsMassachusetts Institute of Technology Cambridge MA 02139 USA
4. CAS Center for Excellence in Topological Quantum ComputationUniversity of Chinese Academy of Sciences Beijing 100190 China