3Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
4Dahlem Center for Complex Quantum Systems, Fachbereich Physik, and Halle-Berlin-Regensburg Cluster of Excellence CCE, Freie Universität Berlin, 14195 Berlin, Germany
5Institute of Quantum Information and Matter and Department of Physics, California Institute of Technology, Pasadena, California 91125, USA