First-order phase transitions in the Kuramoto model with compact bimodal frequency distributions

Pietras, Bastian and Deschle, Nicolás and Daffertshofer, Andreas (2018) First-order phase transitions in the Kuramoto model with compact bimodal frequency distributions. Physical Review E, 98 (6). ISSN 1539-3755

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Abstract

The Kuramoto model of a network of coupled phase oscillators exhibits a first-order phase transition when the distribution of natural frequencies has a finite flat region at its maximum. First-order phase transitions including hysteresis and bistability are also present if the frequency distribution of a single network is bimodal. In this study, we are interested in the interplay of these two configurations and analyze the Kuramoto model with compact bimodal frequency distributions in the continuum limit. As of yet, a rigorous analytic treatment has been elusive. By combining Kuramoto's self-consistency approach, Crawford's symmetry considerations, and exploiting the Ott-Antonsen ansatz applied to a family of rational distribution functions that converge towards the compact distribution, we derive a full bifurcation diagram for the system's order-parameter dynamics. We show that the route to synchronization always passes through a standing wave regime when the bimodal distribution is compounded by two unimodal distributions with compact support. This is in contrast to a possible transition across a region of bistability when the two compounding unimodal distributions have infinite support.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review E
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
140511
Deposited By:
Deposited On:
20 Jan 2020 09:55
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Nov 2020 06:45