Coexisting synchronous and asynchronous states in locally coupled array of oscillators by partial self-feedback control

TL;DR

This paper demonstrates how partial self-feedback control can induce coexisting synchronous and asynchronous states in arrays of oscillators, allowing manipulation of subpopulation sizes in both Landau-Stuart and Kuramoto-Sakaguchi models.

Contribution

It introduces a novel control method to generate and manipulate chimera-like states in oscillator arrays using partial self-feedback.

Findings

Coexistence of synchronous and asynchronous subpopulations achieved.

Control over subpopulation sizes via feedback strength and coupling.

Numerical validation with Landau-Stuart and Kuramoto-Sakaguchi models.

Abstract

We report the emergence of coexisting synchronous and asynchronous subpopulations of oscillators in one dimensional arrays of identical oscillators by applying a self-feedback control. When a self-feedback is applied to a subpopulation of the array, similar to chimera states, it splits into two/more sub-subpopulations coexisting in coherent and incoherent states for a range of self-feedback strength. By tuning the coupling between the nearest neighbors and the amount of self-feedback in the perturbed subpopulation, the size of the coherent and the incoherent sub-subpopulations in the array can be controlled, although the exact size of them is unpredictable. We present numerical evidence using the Landau-Stuart (LS) system and the Kuramoto-Sakaguchi (KS) phase model.