Superperiodicity, chaos and coexisting orbits of ion-acoustic waves (IAWs) are studied in a multi-component plasma consisting of fluid ions, q -nonextensive cold and hot electrons and Maxwellian hot positrons. The significant impacts of the system parameters on superperiodic and nonlinear periodic IAWs are presented. Considering an external periodic perturbation various types of quasiperiodic and chaotic features for IAWs are studied in different parametric ranges through time series’ plots, phase spaces and Lyapunov exponents. It has been observed that there exist some coexisting orbits for IAWs. Coexisting orbits for IAWs in a classical electron–positron–ion plasma system are reported.

中文翻译：

---

四分量非扩展等离子体中离子声波的超周期，混沌和共存轨道

在由流体离子，q-不扩散冷热电子和麦克斯韦热正电子组成的多组分等离子体中研究了离子声波（IAW）的超周期，混沌和共存轨道。提出了系统参数对超周期和非线性周期IAW的重大影响。考虑外部周期性扰动，通过时间序列图，相空间和李雅普诺夫指数，研究了不同参数范围内IAW的各种拟周期和混沌特征。据观察，IAW存在着一些共存的轨道。据报道，在经典的电子-正电子-离子等离子体系统中，IAW并存的轨道。