1. School of Mathematics and Physics University of Science and Technology Beijing Beijing 100083 China
2. Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China
3. Centre for Quantum Technologies National University of Singapore Singapore 117543 Singapore
4. MajuLab CNRS‐UNS‐NUS‐NTU International Joint Research Unit UMI Singapore 3654 Singapore
5. National Institute of Education and Institute of Advanced Studies Nanyang Technological University Singapore 637616 Singapore