1. Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
2. AWS Center for Quantum Computing, Pasadena, California 91125, USA
3. Department of Physics and Research Center OPTIMAS, University of Kaiserslautern-Landau, D-67663 Kaiserslautern, Germany
4. Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, USA