1. Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany.
2. Jülich Aachen Research Alliance (JARA)–Fundamentals of Future Information Technology, 52425 Jülich, Germany.
3. Experimentalphysik IV A, RWTH Aachen University, Otto-Blumenthal-Straße, 52074 Aachen, Germany.
4. Machine Learning Group, Technische Universität Berlin, 10587 Berlin, Germany.
5. Max Planck Institute for Informatics, 66123 Saarbrücken, Germany.
6. Department of Brain and Cognitive Engineering, Korea University, Seoul, South Korea.