1. National Laboratory of Solid State Microstructures, School of Physics, Nanjing University 1 , Nanjing 210093, China
2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China 2 , Hefei, Anhui 230026, China
3. Shishan Laboratory, Suzhou Campus of Nanjing University 3 , Suzhou 215000, China
4. Hefei National Laboratory 4 , Hefei 230088, China