1. School
of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia
2. The
Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria 3052, Australia
3. Centre
for Quantum Computation and Communication Technology, University of New South Wales, Kensington, NSW 2052, Australia
4. IMEM-CNR Institute, Parco Area
delle Scienze 37/A, 43124 Parma, Italy
5. School
of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
6. Centre for
Quantum Computing and Communication Technology, School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia