Simple driven chaotic oscillators with complex variables

Chaos. 2009 Mar;19(1):013124. doi: 10.1063/1.3080193.

Abstract

Despite a search, no chaotic driven complex-variable oscillators of the form z+f(z)=e(iOmegat) or z+f(z)=e(iOmegat) are found, where f is a polynomial with real coefficients. It is shown that, for analytic functions f(z), driven complex-variable oscillators of the form z+f(z)=e(iOmegat) cannot have chaotic solutions. Seven simple driven chaotic oscillators of the form z+f(z,z)=e(iOmegat) with polynomial f(z,z) are given. Their chaotic attractors are displayed, and Lyapunov spectra are calculated. Attractors for two of the cases have symmetry across the x=-y line. The systems' behavior with Omega as a control parameter in the range of Omega=0.1-2.0 is examined, revealing cases of period doubling, intermittency, chaotic transients, and period adding as routes to chaos. Numerous cases of coexisting attractors are also observed.

MeSH terms

  • Algorithms
  • Computer Simulation
  • Models, Theoretical
  • Nonlinear Dynamics*
  • Oscillometry*
  • Particle Accelerators
  • Reproducibility of Results
  • Time Factors