1. ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, The University of Western Australia, Crawley, Western Australia 6009, Australia
2. ARC Centre of Excellence for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia
3. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, Australia