1. Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543
2. Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
3. MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit, UMI 3654, Singapore
4. National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616
5. School of Electrical and Electronic Engineering Block S2.1, 50 Nanyang Avenue, Singapore 639798