The changing notion of chimera states, a critical review

Frequency chimera state induced by differing dynamical timescales

“…In fact, the notion of chimera state itself seems to be changing and expanding within the last decade [1,28] to encompass a wide range of phenomena, with several types added, like amplitude chimera [29,30], amplitude-mediated chimera [31], chimeralike states [32], chimera death [33], phase-flip chimera [34], breathing chimera [35], traveling chimera [36], coherence-resonance chimera [37], multichimeras [38,39], spiral wave chimera [40], self-propelled chimeras [41] etc. In this Letter, we introduce a new type of frequency chimera in which the coherence and incoherence are characterized in terms of the frequency of the oscillations, coherence corresponds to frequency synchronized state and incoherence relates to varying frequencies.…”