  A nonlinear oscillator model with negative time-delayed feedback is studied
numeri- cally under external deterministic and stochastic forcing. It is found
that in the unforced system complex partial synchronization patterns like
chimera states as well as salt-and-pepper like soli- tary states arise on the
route from regular dynamics to spatio-temporal chaos. The control of the
dynamics by external periodic forcing is demonstrated by numerical simulations.
It is shown that one-cluster and multi-cluster chimeras can be achieved by
adjusting the external forcing frequency to appropriate resonance conditions.
If a stochastic component is superimposed to the determin- istic external
forcing, chimera states can be induced in a way similar to stochastic
resonance, they appear, therefore, in regimes where they do not exist without
noise.

Adaptation and Self-Organizing Systems