Polynomial law for controlling the generation of n-scroll chaotic   attractors in an optoelectronic delayed oscillator
  Controlled transitions between a hierarchy of n-scroll attractors are investigated in a nonlinear optoelectronic oscillator. Using the system's feedback strength as a control parameter, it is shown experimentally the transition from Van der Pol-like attractors to 6-scroll, but in general, this scheme can produce an arbitrary number of scrolls. The complexity of every state is characterized by Lyapunov exponents and autocorrelation coefficients. 
Bicky A. M\'arquez, Jos\'e J. Su\'arez-Vargas, Javier A. Ram\'irez
nlin.CD physics.optics