Coherence resonance versus synchronization in a periodically forced self-sustained system.
A fundamental relationship between coherence resonance (CR) and phase synchronization in a self-sustained system in the presence of noise is addressed. A Van der Pol system synchronized by external forcing is taken as an example. It is shown that, in breaking down synchronization, applied noise creates a new ordered motion whose coherence depends resonantly on its intensity, i.e., CR occurs. The same is true for both types of synchronization, via phase locking and via suppression: only the mechanisms of CR differ. The result is valid for any order n:m of synchronization.
Balanov
A G
AG
Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom.
Janson
N B
NB
Postnov
D E
DE
McClintock
P V E
PV