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Electrostatic rogue waves in double pair plasmas.

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This study investigates ion-acoustic waves in complex plasma systems. Findings reveal how negative ions and positrons influence wave stability and rogue wave formation, with applications in space and laboratory plasmas.

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Area of Science:

  • Plasma Physics
  • Astrophysics
  • Nonlinear Dynamics

Background:

  • Ion-acoustic waves (IAWs) are fundamental in plasma physics.
  • Double pair plasmas exhibit complex wave behaviors.
  • Super-thermal charged particles significantly alter plasma dynamics.

Purpose of the Study:

  • To analyze the modulational instability of IAWs in a double pair plasma.
  • To identify conditions for stable and unstable wave propagation.
  • To explore the generation of rogue waves in such systems.

Main Methods:

  • Derivation of a nonlinear Schrödinger equation.
  • Analytical investigation of wave modes and stability criteria.
  • Analysis of the influence of plasma constituents on wave dynamics.

Main Results:

  • Two distinct modes (fast and slow) of IAWs were identified.
  • Stable and unstable regions for IAWs were determined under external perturbations.
  • Negative ion density and positron density were found crucial for rogue wave generation.

Conclusions:

  • The study provides a theoretical framework for understanding IAWs in complex plasmas.
  • Results have implications for astrophysical environments like Earth's ionosphere and laboratory plasmas.
  • The findings contribute to the prediction and control of rogue waves in plasmas.