Funding for this research was provided by:
Directorate for Mathematical and Physical Sciences (DMS-1600560)
Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft (SFB 1173, GRK 1838)
Karlsruher Institut für Technologie (KHYS Research Travel Grant)
Simons Foundation (359963)
Article History
Received: 31 July 2017
Accepted: 5 August 2018
First Online: 21 September 2018