1. Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
2. Atomic, Molecular and Optical Physics Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
3. Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
4. Department of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
5. Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300350, China
6. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China