title: Conjugate feedback induced suppression and generation of oscillations in the Chua circuit: experiments and simulations.
abstract: We study the suppression (amplitude death) and generation of oscillations (rhythmogenesis) in the Chua circuit using a feedback term consisting of conjugate variables (conjugate feedback). When the independent Chua circuit (without feedback) is placed in the oscillatory domain, this conjugate feedback induces amplitude death in the system. On the contrary, introducing the conjugate feedback in the system exhibiting fixed point behavior results in the generation of rhythms. Furthermore, it is observed that the dynamics of the Chua circuit could be tuned efficiently by varying the strength of this feedback term. Both experimental and numerical results are presented.
authors.affiliation: Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
authors.forename: Tirtha
authors.initials: T
authors.lastname: Mandal
authors.forename: Tanu
authors.initials: T
authors.lastname: Singla
authors.forename: M
authors.initials: M
authors.lastname: Rivera
authors.forename: P
authors.initials: P
authors.lastname: Parmananda
mesh_terms: D000669:Amplifiers, Electronic; D003198:Computer Simulation; D004553:Electric Conductivity; D017097:Electric Impedance; D004581:Electronics / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D005246:Feedback; D017711:Nonlinear Dynamics; D009716:Numerical Analysis, Computer-Assisted; D009991:Oscillometry; D010507:Periodicity; D013997:Time Factors