Volume 81, Number 4, February 2008
Article Number 40004
Number of page(s) 6
Section General
Published online 18 January 2008
EPL, 81 (2008) 40004
DOI: 10.1209/0295-5075/81/40004

Noise-induced synchronisation in heterogeneous nets of neural elements

E. Glatt, M. Gassel and F. Kaiser

Institute of Applied Physics, Darmstadt University of Technology - 64289 Darmstadt, Germany

received 16 October 2007; accepted in final form 14 December 2007; published February 2008
published online 18 January 2008

The interplay of additive noise and additive variability in an oscillatory net of neural elements is studied. With variability the net is a mixture of oscillatory and excitable elements. Even small values of the variability strength induce pattern formation and thus the elements do not oscillate synchronously anymore. In such heterogeneous nets additive noise can induce a regular synchronised net dynamics. This noise-induced synchronisation shows a resonance- like dependency on the noise strength. Furthermore, in the presence of noise, the coherence of the variability-induced patterns exhibits a resonance-like dependency on the variability strength and one finds maximally coherent pattern formation for intermediate values of this quantity.

05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
05.45.Xt - Synchronisation; coupled oscillators.

© EPLA 2008