1. Department of Physics and Astronomy and Pittsburgh Quantum Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
2. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
4. Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
5. Department of Chemical Physics, Fritz-Haber-Institute der Max-Plank-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
6. Institute of Physics, University of Graz, Universitätsplatz 5, A-8010 Graz, Austria