1. Max Planck Institute for Dynamics and Self‐Organization (MPIDS) 37077 Göttingen Germany
2. Jožef Stefan Institute Ljubljana 1000 Slovenia
3. Graduate School of Frontier Biosciences Osaka University Osaka 5650871 Japan
4. Center for Information and Neural Networks (CiNet) National Institute of Information and Communications Technology Osaka 565‐0871 Japan
5. Advanced ICT Research Institute National Institute of Information and Communications Technology Kobe 651‐2492 Japan
6. Graduate School of Life Science University of Hyogo Hyogo 678‐1297 Japan
7. Institute for Dynamics of Complex Systems Georg‐August‐University Göttingen 37073 Göttingen Germany
8. Laboratory of Atomic and Solid‐State Physics Cornell University Ithaca NY 14853 USA
9. Rudolf Peierls Centre for Theoretical Physics University of Oxford Oxford OX1 3PU UK