1. Faculty of Physics, Ludwig-Maximilians-Universität Munich, D-85748 Garching, Germany.
2. Max Planck Institute of Quantum Optics, D-85748 Garching, Germany.
3. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China.
4. Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
5. Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität Munich, D-80539 Munich, Germany.
6. Collobratory for Advanced Computing and Simulations, University of Southern California, Los Angeles, CA 90089, USA.
7. Department of Physics, Kumamoto University, Kumamoto 860-0862, Japan.
8. Department of Physics, Escuela Politecnica Nacional, Quito 170525, Ecuador.
9. Department of Physics, Imperial College London, London SW7 2AZ, UK.
10. School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia.
11. Applied Physics Department, Stanford University, Stanford, CA 94305, USA.