1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
2. MajuLab, International Joint Research Unit UMI 3654,
CNRS, Université
Côte d’Azur, Sorbonne Université, National University
of Singapore, Nanyang Technological University,
3. State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, P.R. China
4. Beijing Academy of Quantum Information Sciences, Beijing 100193, P.R. China