Identification of single- and double-well coherence-incoherence patterns by the binary distance matrix

The study of chimera states or, more generally, coherence-incoherence patterns has led to the development of several tools for their identification and characterization. In this work, we extend the eigenvalue decomposition method to distinguish between single-well (SW) and double-well (DW) patterns. By applying our method, we are able to identify the following four types of dynamical patterns in a ring of nonlocally coupled Chua circuits and nonlocally coupled cubic maps: SW cluster, SW coherence-incoherence pattern, DW cluster, and DW coherence-incoherence. In a ring-star network of Chua circuits, we investigate the influence of adding a central node on the spatio-temporal patterns. Our results show that increasing the coupling with the central node favors the occurrence of SW coherence-incoherence states. We observe that the boundaries of the attraction basins resemble fractal and riddled structures.& COPY; 2023 Elsevier B.V. All rights reserved.