Dust-acoustic rogue waves in non-thermal plasmas

TL;DR

This paper theoretically investigates dust-acoustic rogue waves in a complex plasma with multiple charged species, analyzing how various plasma parameters influence rogue wave formation and stability.

Contribution

It introduces a detailed theoretical model for dust-acoustic rogue waves in a four-component plasma, highlighting the effects of plasma parameters on wave stability and rogue wave characteristics.

Findings

Physical parameters significantly influence rogue wave formation.

Temperature ratios affect modulational stability.

Density variations impact rogue wave amplitude.

Abstract

The nonlinear propagation of dust-acoustic (DA) waves (DAWs) and associated DA rogue waves (DARWs), which are governed by the nonlinear Schr\"{o}dinger equation, is theoretically investigated in a four component plasma medium containing inertial warm negatively charged dust grains and inertialess non-thermal distributed electrons as well as iso-thermal positrons and ions. The modulationally stable and unstable parametric regimes of DAWs are numerically studied for the plasma parameters. Furthermore, the effects of temperature ratios of ion-to-electron and ion-to-positron, and the number density of ion and dust grains on the DARWs are investigated. It is observed that the physical parameters play a very crucial role in the formation of DARWs. These results may be useful in understanding the electrostatic excitations in dusty plasmas in space and laboratory situations.