Chimera states in a population of identical oscillators under planar   cross-coupling
  We report the existence of a chimera state in an assembly of identical nonlinear oscillators that are globally linked to each other in a simple planar cross-coupled form. The rotational symmetry breaking of the coupling term appears to be responsible for the emergence of these collective states that display a characteristic coexistence of coherent and incoherent behaviour. Our finding, seen in both a collection of van der Pol oscillators and chaotic Rossler oscillators, further simplifies the existence criterion for chimeras and thereby broadens the range of their applicability to real world situations. 
C. R. Hens, A. Mishra, P.K. Roy, A. Sen, S.K. Dana
nlin.CD nlin.AO