1. Department of Combinatorics and Optimization, Faculty of Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
2. Department of Mathematical Sciences, Clemson University, Clemson, SC, United States 29634
3. Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
4. Department of Electrical & Computer Engineering, University of Toronto, Toronto, Ontario, Canada M5S 3G4