1. Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany
2. Laboratory of Computational Science and Modeling, IMX, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
3. Institute of Theoretical Chemistry, Ulm University, 89081 Ulm, Germany
4. Department of Physics and Information Technology, Kyushu Institute of Technology, 820-8502 Iizuka, Japan
5. PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
6. Institute of Theoretical and Computational Physics, Graz University of Technology, 8010 Graz, Austria