CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China;
Department of Physics National University of Singapore Singapore 117542 Singapore;
Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China;
Songshan Lake Materials Laboratory Dongguan 523808 China;
CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China;
CAS Center For Excellence in Quantum Information and Quantum Physics Hefei 230026 China;
