[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Anhui Prov Key Lab Quantum Network, Hefei 230026, Peoples R China
[3] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phys, Hefei 230026, Peoples R China
[4] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, England
[5] Univ Sci & Technol China, Hefei Natl Lab, Hefei 230088, Peoples R China