Scaling law of transient lifetime of chimera states under dimension-augmenting perturbations

Ling Wei Kong, Ying Cheng Lai

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Chimera states arising in the classic Kuramoto system of two-dimensional phase-coupled oscillators are transient but they are "long" transients in the sense that the average transient lifetime grows exponentially with the system size. For reasonably large systems, e.g., those consisting of a few hundred oscillators, it is infeasible to numerically calculate or experimentally measure the average lifetime, so the chimera states are practically permanent. We find that small perturbations in the third dimension, which make system "slightly" three dimensional, will reduce dramatically the transient lifetime. In particular, under such a perturbation, the practically infinite average transient lifetime will become extremely short because it scales with the magnitude of the perturbation only logarithmically. Physically, this means that a reduction in the perturbation strength over many orders of magnitude, insofar as it is not zero, would result in only an incremental increase in the lifetime. The uncovered type of fragility of chimera states raises concerns about their observability in physical systems.

Original languageEnglish (US)
Article number023196
JournalPhysical Review Research
Volume2
Issue number2
DOIs
StatePublished - May 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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