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Emergence of chimeras through induced multistability


  Sangeeta Rani Ujjwal [1]  ,  Nirmal Punetha [2]  ,  Awadhesh Prasad [3]  ,  Ramakrishna Ramaswamy [4]  
 [1] Department of Solar Energy and Environmental Physics, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 8499000, Israel
[2] Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, D-01187 Dresden, Germany
[3] Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
[4] School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India

 

The emergence of chimeras, namely coexisting synchronous and desynchronized dynamics, 

through induced multistability is studied where we intro-

duce a novel scheme to obtain chimeras in an ensemble of identical chaotic oscillators by

suitably coupling the individual oscillators so as to create multistability in the system.

We observe that an ensemble of identical chaotic oscillators with global coupling and also

under the influence of a common noise or external chaotic, periodic or quasiperiodic signal,

can exhibit chimeras at appropriate parameter values. This is due to the coexistence of

multiple attractors of different types on which both synchronized and incoherent dynamics

are possible. We examine the mechanism of the emergence of these chimeric states and

discuss the generality of the results.