Abstract
An examination of the effect of noise on a general system at a saddle-node bifurcation has revealed that, in the limit of weak noise, the probability density of the time to pass through the saddle-node has a universal shape, the specific kinetics of the particular system serving only to set the time scale. This probability density is displayed and its salient features are explicated. In the case of a saddle-node bifurcation leading to relaxation oscillations, this analysis leads to the prediction of the existence of noise-induced oscillations which appear much less random than might at first be expected. The period of these oscillations has a well-defined, nonzero most probable value, the inverse of which is a noise-induced frequency. This frequency can be detected as a peak in power spectra from numerical simulations of such a system. This is the first case of the prediction and detection of a noise-induced frequency of which the authors are aware.
Similar content being viewed by others
References
F. H. Busse and K. E. Heikes,Science 208:173 (1980).
F. H. Busse, inChaos and Order in Nature, H. Haken, ed. (Springer-Verlag, Berlin, 1981).
G. Mayer-Kress and H. Haken,Phys. Lett. 82A:151 (1981).
E. Stone and P. Holmes, submitted toSIAM J. of App. Math.
D. Sigeti, Dissertation, University of Texas at Austin (1988).
D. Sigeti and W. Horsthemke, to be published.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sigeti, D., Horsthemke, W. Pseudo-regular oscillations induced by external noise. J Stat Phys 54, 1217–1222 (1989). https://doi.org/10.1007/BF01044713
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01044713