2019/04/14 by Nishat Tamanna, Tamanna, N. K., N. A. Chowdhury +5
Earth and Planetary Sciences · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Dust and Plasma Wave Phenomena #Earthquake Detection and Analysis #FOS: Physical sciences #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.1904.06653
openalex publication_date 2019/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A double pair plasma system containing cold inertial positive and negative ions, and inertialess super-thermal electrons and positrons is considered. The standard nonlinear Schrödinger equation is derived by using the reductive perturbation method to investigate the nonlinear dynamics of the ion-acoustic waves (IAWs) as well as their modulation instability. It is observed that the ion-acoustic dark (bright) envelope solitons are formed for modulationally stable (unstable) plasma region, and that the presence of highly dense super-thermal electrons and positrons enhances (reduces) this unstable (stable) region. It is also found that the effect of super-thermality of electron or positron species causes to increase the nonlinearity, and to fasten the formation of the bright envelope solitons. These results are applicable to both space and laboratory plasma systems for understanding the propagation of localized electrostatic disturbances.