1. Shenzhen Institute for Quantum Science and Engineering and Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055 China
2. Department of PhysicsCity University of Hong KongTat Chee Avenue Kowloon Hong Kong SAR 999077 China
3. Department of EngineeringUniversity of CambridgeJJ Thomson Avenue CB3 0FA Cambridge United Kingdom
4. Shenzhen Key Laboratory of Quantum Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055 China
5. Central Research InstituteHuawei TechnologiesShenzhen 518129 China