Effective Fokker-Planck equation for birhythmic modified van der Pol oscillator

Carregando...
Imagem de Miniatura

Data

2012-12-01

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

American Institute of Physics (AIP)

Tipo

Artigo

Direito de acesso

Acesso restrito

Resumo

We present an explicit solution based on the phase-amplitude approximation of the Fokker-Planck equation associated with the Langevin equation of the birhythmic modified van der Pol system. The solution enables us to derive probability distributions analytically as well as the activation energies associated with switching between the coexisting different attractors that characterize the birhythmic system. Comparing analytical and numerical results we find good agreement when the frequencies of both attractors are equal, while the predictions of the analytic estimates deteriorate when the two frequencies depart. Under the effect of noise, the two states that characterize the birhythmic system can merge, inasmuch as the parameter plane of the birhythmic solutions is found to shrink when the noise intensity increases. The solution of the Fokker-Planck equation shows that in the birhythmic region, the two attractors are characterized by very different probabilities of finding the system in such a state. The probability becomes comparable only for a narrow range of the control parameters, thus the two limit cycles have properties in close analogy with the thermodynamic phases. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766678]

Descrição

Palavras-chave

Idioma

Inglês

Como citar

Chaos. Melville: Amer Inst Physics, v. 22, n. 4, p. 9, 2012.

Itens relacionados