[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Univ Toronto, Ctr Quantum Informat & Quantum Control, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
[3] Univ Toronto, Dept Phys, Toronto, ON M5S 3G4, Canada