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Higher-order interactions shape collective dynamics differently in hypergraphs and simplicial complexes
Title / Series / Name
Publication Volume
Publication Issue
Pages
Editors
Keywords
General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy
URI
https://hdl.handle.net/20.500.14018/26698
Abstract
Higher-order networks have emerged as a powerful framework to model complex systems and their collective behavior. Going beyond pairwise interactions, they encode structured relations among arbitrary numbers of units through representations such as simplicial complexes and hypergraphs. So far, the choice between simplicial complexes and hypergraphs has often been motivated by technical convenience. Here, using synchronization as an example, we demonstrate that the effects of higher-order interactions are highly representation-dependent. In particular, higher-order interactions typically enhance synchronization in hypergraphs but have the opposite effect in simplicial complexes. We provide theoretical insight by linking the synchronizability of different hypergraph structures to (generalized) degree heterogeneity and cross-order degree correlation, which in turn influence a wide range of dynamical processes from contagion to diffusion. Our findings reveal the hidden impact of higher-order representations on collective dynamics, highlighting the importance of choosing appropriate representations when studying systems with nonpairwise interactions.
Topic
Publisher
Place of Publication
Type
Journal article
Date
2023-03-23
Language
ISBN
Identifiers
10.1038/s41467-023-37190-9