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      https://www.ias.ac.in/article/fulltext/pram/094/0058

    • Keywords

       

      Nonlinear Schrödinger equation; modulational instability; rogue waves

    • Abstract

       

      The nonlinear propagation of dust-acoustic waves (DAWs) and associated dust-acoustic rogue waves (DARWs), which are governed by the nonlinear Schrödinger equation, is theoretically investigated in a four componentplasma medium containing inertial warm negatively charged dust grains and inertialess non-thermal distributed electrons as well as isothermal 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 physical parameters play very crucial roles in the formation of DARWs. These results may be useful in understanding the electrostatic excitations in dusty plasmas in space and laboratory situations.

    • Author Affiliations

       

      S K PAUL1 N A CHOWDHURY2 3 A MANNAN2 4 A A MAMUN2

      1. Department of Basic Sciences and Humanities, University of Asia Pacific, Farmgate, Dhaka 1205, Bangladesh
      2. Department of Physics, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
      3. Plasma Physics Division, Atomic Energy Centre, Dhaka 1000, Bangladesh
      4. Institut für Mathematik, Martin Luther Universität Halle-Wittenberg, 06099 Halle, Germany
    • Dates

       
  • Pramana – Journal of Physics | News

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